1 | //
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2 | // C++ Implementation: STMath
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3 | //
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4 | // Description:
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5 | //
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6 | //
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7 | // Author: Malte Marquarding <asap@atnf.csiro.au>, (C) 2006
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8 | //
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9 | // Copyright: See COPYING file that comes with this distribution
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10 | //
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11 | //
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12 |
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13 | #include <casa/iomanip.h>
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14 | #include <casa/Exceptions/Error.h>
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15 | #include <casa/Containers/Block.h>
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16 | #include <casa/BasicSL/String.h>
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17 | #include <casa/Arrays/MaskArrLogi.h>
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18 | #include <casa/Arrays/MaskArrMath.h>
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19 | #include <casa/Arrays/ArrayLogical.h>
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20 | #include <casa/Arrays/ArrayMath.h>
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21 | #include <casa/Arrays/Slice.h>
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22 | #include <casa/Arrays/Slicer.h>
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23 | #include <casa/Containers/RecordField.h>
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24 | #include <tables/Tables/TableRow.h>
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25 | #include <tables/Tables/TableVector.h>
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26 | #include <tables/Tables/TabVecMath.h>
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27 | #include <tables/Tables/ExprNode.h>
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28 | #include <tables/Tables/TableRecord.h>
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29 | #include <tables/Tables/TableParse.h>
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30 | #include <tables/Tables/ReadAsciiTable.h>
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31 | #include <tables/Tables/TableIter.h>
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32 | #include <tables/Tables/TableCopy.h>
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33 | #include <scimath/Mathematics/FFTServer.h>
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34 |
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35 | #include <lattices/Lattices/LatticeUtilities.h>
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36 |
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37 | #include <coordinates/Coordinates/SpectralCoordinate.h>
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38 | #include <coordinates/Coordinates/CoordinateSystem.h>
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39 | #include <coordinates/Coordinates/CoordinateUtil.h>
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40 | #include <coordinates/Coordinates/FrequencyAligner.h>
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41 |
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42 | #include <scimath/Mathematics/VectorKernel.h>
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43 | #include <scimath/Mathematics/Convolver.h>
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44 | #include <scimath/Functionals/Polynomial.h>
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45 |
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46 | #include "MathUtils.h"
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47 | #include "RowAccumulator.h"
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48 | #include "STAttr.h"
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49 | #include "STMath.h"
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50 |
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51 | using namespace casa;
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52 |
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53 | using namespace asap;
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54 |
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55 | STMath::STMath(bool insitu) :
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56 | insitu_(insitu)
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57 | {
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58 | }
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59 |
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60 |
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61 | STMath::~STMath()
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62 | {
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63 | }
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64 |
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65 | CountedPtr<Scantable>
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66 | STMath::average( const std::vector<CountedPtr<Scantable> >& in,
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67 | const std::vector<bool>& mask,
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68 | const std::string& weight,
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69 | const std::string& avmode)
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70 | {
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71 | if ( avmode == "SCAN" && in.size() != 1 )
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72 | throw(AipsError("Can't perform 'SCAN' averaging on multiple tables.\n"
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73 | "Use merge first."));
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74 | WeightType wtype = stringToWeight(weight);
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75 |
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76 | // output
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77 | // clone as this is non insitu
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78 | bool insitu = insitu_;
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79 | setInsitu(false);
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80 | CountedPtr< Scantable > out = getScantable(in[0], true);
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81 | setInsitu(insitu);
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82 | std::vector<CountedPtr<Scantable> >::const_iterator stit = in.begin();
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83 | ++stit;
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84 | while ( stit != in.end() ) {
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85 | out->appendToHistoryTable((*stit)->history());
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86 | ++stit;
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87 | }
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88 |
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89 | Table& tout = out->table();
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90 |
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91 | /// @todo check if all scantables are conformant
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92 |
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93 | ArrayColumn<Float> specColOut(tout,"SPECTRA");
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94 | ArrayColumn<uChar> flagColOut(tout,"FLAGTRA");
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95 | ArrayColumn<Float> tsysColOut(tout,"TSYS");
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96 | ScalarColumn<Double> mjdColOut(tout,"TIME");
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97 | ScalarColumn<Double> intColOut(tout,"INTERVAL");
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98 | ScalarColumn<uInt> cycColOut(tout,"CYCLENO");
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99 | ScalarColumn<uInt> scanColOut(tout,"SCANNO");
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100 |
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101 | // set up the output table rows. These are based on the structure of the
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102 | // FIRST scantable in the vector
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103 | const Table& baset = in[0]->table();
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104 |
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105 | Block<String> cols(3);
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106 | cols[0] = String("BEAMNO");
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107 | cols[1] = String("IFNO");
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108 | cols[2] = String("POLNO");
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109 | if ( avmode == "SOURCE" ) {
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110 | cols.resize(4);
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111 | cols[3] = String("SRCNAME");
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112 | }
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113 | if ( avmode == "SCAN" && in.size() == 1) {
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114 | cols.resize(4);
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115 | cols[3] = String("SCANNO");
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116 | }
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117 | uInt outrowCount = 0;
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118 | TableIterator iter(baset, cols);
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119 | while (!iter.pastEnd()) {
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120 | Table subt = iter.table();
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121 | // copy the first row of this selection into the new table
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122 | tout.addRow();
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123 | TableCopy::copyRows(tout, subt, outrowCount, 0, 1);
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124 | // re-index to 0
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125 | if ( avmode != "SCAN" && avmode != "SOURCE" ) {
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126 | scanColOut.put(outrowCount, uInt(0));
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127 | }
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128 | ++outrowCount;
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129 | ++iter;
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130 | }
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131 | RowAccumulator acc(wtype);
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132 | Vector<Bool> cmask(mask);
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133 | acc.setUserMask(cmask);
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134 | ROTableRow row(tout);
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135 | ROArrayColumn<Float> specCol, tsysCol;
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136 | ROArrayColumn<uChar> flagCol;
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137 | ROScalarColumn<Double> mjdCol, intCol;
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138 | ROScalarColumn<Int> scanIDCol;
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139 |
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140 | for (uInt i=0; i < tout.nrow(); ++i) {
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141 | for ( int j=0; j < int(in.size()); ++j ) {
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142 | const Table& tin = in[j]->table();
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143 | const TableRecord& rec = row.get(i);
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144 | ROScalarColumn<Double> tmp(tin, "TIME");
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145 | Double td;tmp.get(0,td);
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146 | Table basesubt = tin(tin.col("BEAMNO") == Int(rec.asuInt("BEAMNO"))
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147 | && tin.col("IFNO") == Int(rec.asuInt("IFNO"))
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148 | && tin.col("POLNO") == Int(rec.asuInt("POLNO")) );
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149 | Table subt;
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150 | if ( avmode == "SOURCE") {
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151 | subt = basesubt( basesubt.col("SRCNAME") == rec.asString("SRCNAME") );
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152 | } else if (avmode == "SCAN") {
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153 | subt = basesubt( basesubt.col("SCANNO") == Int(rec.asuInt("SCANNO")) );
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154 | } else {
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155 | subt = basesubt;
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156 | }
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157 | specCol.attach(subt,"SPECTRA");
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158 | flagCol.attach(subt,"FLAGTRA");
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159 | tsysCol.attach(subt,"TSYS");
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160 | intCol.attach(subt,"INTERVAL");
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161 | mjdCol.attach(subt,"TIME");
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162 | Vector<Float> spec,tsys;
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163 | Vector<uChar> flag;
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164 | Double inter,time;
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165 | for (uInt k = 0; k < subt.nrow(); ++k ) {
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166 | flagCol.get(k, flag);
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167 | Vector<Bool> bflag(flag.shape());
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168 | convertArray(bflag, flag);
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169 | if ( allEQ(bflag, True) ) {
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170 | continue;//don't accumulate
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171 | }
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172 | specCol.get(k, spec);
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173 | tsysCol.get(k, tsys);
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174 | intCol.get(k, inter);
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175 | mjdCol.get(k, time);
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176 | // spectrum has to be added last to enable weighting by the other values
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177 | acc.add(spec, !bflag, tsys, inter, time);
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178 | }
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179 | }
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180 | //write out
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181 | specColOut.put(i, acc.getSpectrum());
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182 | const Vector<Bool>& msk = acc.getMask();
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183 | Vector<uChar> flg(msk.shape());
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184 | convertArray(flg, !msk);
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185 | flagColOut.put(i, flg);
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186 | tsysColOut.put(i, acc.getTsys());
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187 | intColOut.put(i, acc.getInterval());
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188 | mjdColOut.put(i, acc.getTime());
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189 | // we should only have one cycle now -> reset it to be 0
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190 | // frequency switched data has different CYCLENO for different IFNO
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191 | // which requires resetting this value
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192 | cycColOut.put(i, uInt(0));
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193 | acc.reset();
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194 | }
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195 | return out;
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196 | }
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197 |
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198 | CountedPtr< Scantable >
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199 | STMath::averageChannel( const CountedPtr < Scantable > & in,
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200 | const std::string & mode,
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201 | const std::string& avmode )
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202 | {
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203 | // clone as this is non insitu
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204 | bool insitu = insitu_;
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205 | setInsitu(false);
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206 | CountedPtr< Scantable > out = getScantable(in, true);
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207 | setInsitu(insitu);
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208 | Table& tout = out->table();
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209 | ArrayColumn<Float> specColOut(tout,"SPECTRA");
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210 | ArrayColumn<uChar> flagColOut(tout,"FLAGTRA");
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211 | ArrayColumn<Float> tsysColOut(tout,"TSYS");
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212 | ScalarColumn<uInt> scanColOut(tout,"SCANNO");
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213 | ScalarColumn<Double> intColOut(tout, "INTERVAL");
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214 | Table tmp = in->table().sort("BEAMNO");
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215 | Block<String> cols(3);
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216 | cols[0] = String("BEAMNO");
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217 | cols[1] = String("IFNO");
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218 | cols[2] = String("POLNO");
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219 | if ( avmode == "SCAN") {
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220 | cols.resize(4);
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221 | cols[3] = String("SCANNO");
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222 | }
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223 | uInt outrowCount = 0;
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224 | uChar userflag = 1 << 7;
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225 | TableIterator iter(tmp, cols);
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226 | while (!iter.pastEnd()) {
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227 | Table subt = iter.table();
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228 | ROArrayColumn<Float> specCol, tsysCol;
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229 | ROArrayColumn<uChar> flagCol;
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230 | ROScalarColumn<Double> intCol(subt, "INTERVAL");
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231 | specCol.attach(subt,"SPECTRA");
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232 | flagCol.attach(subt,"FLAGTRA");
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233 | tsysCol.attach(subt,"TSYS");
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234 | tout.addRow();
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235 | TableCopy::copyRows(tout, subt, outrowCount, 0, 1);
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236 | if ( avmode != "SCAN") {
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237 | scanColOut.put(outrowCount, uInt(0));
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238 | }
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239 | Vector<Float> tmp;
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240 | specCol.get(0, tmp);
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241 | uInt nchan = tmp.nelements();
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242 | // have to do channel by channel here as MaskedArrMath
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243 | // doesn't have partialMedians
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244 | Vector<uChar> flags = flagCol.getColumn(Slicer(Slice(0)));
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245 | Vector<Float> outspec(nchan);
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246 | Vector<uChar> outflag(nchan,0);
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247 | Vector<Float> outtsys(1);/// @fixme when tsys is channel based
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248 | for (uInt i=0; i<nchan; ++i) {
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249 | Vector<Float> specs = specCol.getColumn(Slicer(Slice(i)));
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250 | MaskedArray<Float> ma = maskedArray(specs,flags);
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251 | outspec[i] = median(ma);
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252 | if ( allEQ(ma.getMask(), False) )
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253 | outflag[i] = userflag;// flag data
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254 | }
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255 | outtsys[0] = median(tsysCol.getColumn());
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256 | specColOut.put(outrowCount, outspec);
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257 | flagColOut.put(outrowCount, outflag);
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258 | tsysColOut.put(outrowCount, outtsys);
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259 | Double intsum = sum(intCol.getColumn());
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260 | intColOut.put(outrowCount, intsum);
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261 | ++outrowCount;
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262 | ++iter;
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263 | }
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264 | return out;
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265 | }
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266 |
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267 | CountedPtr< Scantable > STMath::getScantable(const CountedPtr< Scantable >& in,
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268 | bool droprows)
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269 | {
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270 | if (insitu_) return in;
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271 | else {
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272 | // clone
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273 | Scantable* tabp = new Scantable(*in, Bool(droprows));
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274 | return CountedPtr<Scantable>(tabp);
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275 | }
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276 | }
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277 |
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278 | CountedPtr< Scantable > STMath::unaryOperate( const CountedPtr< Scantable >& in,
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279 | float val,
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280 | const std::string& mode,
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281 | bool tsys )
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282 | {
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283 | // modes are "ADD" and "MUL"
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284 | CountedPtr< Scantable > out = getScantable(in, false);
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285 | Table& tab = out->table();
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286 | ArrayColumn<Float> specCol(tab,"SPECTRA");
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287 | ArrayColumn<Float> tsysCol(tab,"TSYS");
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288 | for (uInt i=0; i<tab.nrow(); ++i) {
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289 | Vector<Float> spec;
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290 | Vector<Float> ts;
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291 | specCol.get(i, spec);
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292 | tsysCol.get(i, ts);
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293 | if (mode == "MUL") {
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294 | spec *= val;
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295 | specCol.put(i, spec);
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296 | if ( tsys ) {
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297 | ts *= val;
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298 | tsysCol.put(i, ts);
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299 | }
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300 | } else if ( mode == "ADD" ) {
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301 | spec += val;
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302 | specCol.put(i, spec);
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303 | if ( tsys ) {
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304 | ts += val;
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305 | tsysCol.put(i, ts);
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306 | }
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307 | }
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308 | }
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309 | return out;
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310 | }
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311 |
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312 | MaskedArray<Float> STMath::maskedArray( const Vector<Float>& s,
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313 | const Vector<uChar>& f)
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314 | {
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315 | Vector<Bool> mask;
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316 | mask.resize(f.shape());
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317 | convertArray(mask, f);
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318 | return MaskedArray<Float>(s,!mask);
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319 | }
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320 |
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321 | Vector<uChar> STMath::flagsFromMA(const MaskedArray<Float>& ma)
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322 | {
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323 | const Vector<Bool>& m = ma.getMask();
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324 | Vector<uChar> flags(m.shape());
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325 | convertArray(flags, !m);
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326 | return flags;
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327 | }
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328 |
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329 | CountedPtr< Scantable > STMath::autoQuotient( const CountedPtr< Scantable >& in,
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330 | const std::string & mode,
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331 | bool preserve )
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332 | {
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333 | /// @todo make other modes available
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334 | /// modes should be "nearest", "pair"
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335 | // make this operation non insitu
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336 | const Table& tin = in->table();
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337 | Table ons = tin(tin.col("SRCTYPE") == Int(0));
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338 | Table offs = tin(tin.col("SRCTYPE") == Int(1));
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339 | if ( offs.nrow() == 0 )
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340 | throw(AipsError("No 'off' scans present."));
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341 | // put all "on" scans into output table
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342 |
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343 | bool insitu = insitu_;
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344 | setInsitu(false);
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345 | CountedPtr< Scantable > out = getScantable(in, true);
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346 | setInsitu(insitu);
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347 | Table& tout = out->table();
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348 |
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349 | TableCopy::copyRows(tout, ons);
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350 | TableRow row(tout);
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351 | ROScalarColumn<Double> offtimeCol(offs, "TIME");
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352 | ArrayColumn<Float> outspecCol(tout, "SPECTRA");
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353 | ROArrayColumn<Float> outtsysCol(tout, "TSYS");
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354 | ArrayColumn<uChar> outflagCol(tout, "FLAGTRA");
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355 | for (uInt i=0; i < tout.nrow(); ++i) {
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356 | const TableRecord& rec = row.get(i);
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357 | Double ontime = rec.asDouble("TIME");
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358 | ROScalarColumn<Double> offtimeCol(offs, "TIME");
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359 | Double mindeltat = min(abs(offtimeCol.getColumn() - ontime));
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360 | // Timestamp may vary within a cycle ???!!!
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361 | // increase this by 0.5 sec in case of rounding errors...
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362 | // There might be a better way to do this.
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363 | mindeltat += 0.5;
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364 | Table sel = offs( abs(offs.col("TIME")-ontime) <= (mindeltat+0.5)
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365 | && offs.col("BEAMNO") == Int(rec.asuInt("BEAMNO"))
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366 | && offs.col("IFNO") == Int(rec.asuInt("IFNO"))
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367 | && offs.col("POLNO") == Int(rec.asuInt("POLNO")) );
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368 |
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369 | if ( sel.nrow() < 1 ) {
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370 | throw(AipsError("No closest in time found... This could be a rounding "
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371 | "issue. Try quotient instead."));
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372 | }
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373 | TableRow offrow(sel);
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374 | const TableRecord& offrec = offrow.get(0);//should only be one row
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375 | RORecordFieldPtr< Array<Float> > specoff(offrec, "SPECTRA");
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376 | RORecordFieldPtr< Array<Float> > tsysoff(offrec, "TSYS");
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377 | RORecordFieldPtr< Array<uChar> > flagoff(offrec, "FLAGTRA");
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378 | /// @fixme this assumes tsys is a scalar not vector
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379 | Float tsysoffscalar = (*tsysoff)(IPosition(1,0));
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380 | Vector<Float> specon, tsyson;
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381 | outtsysCol.get(i, tsyson);
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382 | outspecCol.get(i, specon);
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383 | Vector<uChar> flagon;
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384 | outflagCol.get(i, flagon);
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385 | MaskedArray<Float> mon = maskedArray(specon, flagon);
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386 | MaskedArray<Float> moff = maskedArray(*specoff, *flagoff);
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387 | MaskedArray<Float> quot = (tsysoffscalar * mon / moff);
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388 | if (preserve) {
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389 | quot -= tsysoffscalar;
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390 | } else {
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391 | quot -= tsyson[0];
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392 | }
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393 | outspecCol.put(i, quot.getArray());
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394 | outflagCol.put(i, flagsFromMA(quot));
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395 | }
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396 | // renumber scanno
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397 | TableIterator it(tout, "SCANNO");
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398 | uInt i = 0;
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399 | while ( !it.pastEnd() ) {
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400 | Table t = it.table();
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401 | TableVector<uInt> vec(t, "SCANNO");
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402 | vec = i;
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403 | ++i;
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404 | ++it;
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405 | }
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406 | return out;
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407 | }
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408 |
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409 |
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410 | CountedPtr< Scantable > STMath::quotient( const CountedPtr< Scantable > & on,
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411 | const CountedPtr< Scantable > & off,
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412 | bool preserve )
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413 | {
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414 | bool insitu = insitu_;
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415 | if ( ! on->conformant(*off) ) {
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416 | throw(AipsError("'on' and 'off' scantables are not conformant."));
|
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417 | }
|
---|
418 | setInsitu(false);
|
---|
419 | CountedPtr< Scantable > out = getScantable(on, false);
|
---|
420 | setInsitu(insitu);
|
---|
421 | Table& tout = out->table();
|
---|
422 | const Table& toff = off->table();
|
---|
423 | TableIterator sit(tout, "SCANNO");
|
---|
424 | TableIterator s2it(toff, "SCANNO");
|
---|
425 | while ( !sit.pastEnd() ) {
|
---|
426 | Table ton = sit.table();
|
---|
427 | TableRow row(ton);
|
---|
428 | Table t = s2it.table();
|
---|
429 | ArrayColumn<Float> outspecCol(ton, "SPECTRA");
|
---|
430 | ROArrayColumn<Float> outtsysCol(ton, "TSYS");
|
---|
431 | ArrayColumn<uChar> outflagCol(ton, "FLAGTRA");
|
---|
432 | for (uInt i=0; i < ton.nrow(); ++i) {
|
---|
433 | const TableRecord& rec = row.get(i);
|
---|
434 | Table offsel = t( t.col("BEAMNO") == Int(rec.asuInt("BEAMNO"))
|
---|
435 | && t.col("IFNO") == Int(rec.asuInt("IFNO"))
|
---|
436 | && t.col("POLNO") == Int(rec.asuInt("POLNO")) );
|
---|
437 | if ( offsel.nrow() == 0 )
|
---|
438 | throw AipsError("STMath::quotient: no matching off");
|
---|
439 | TableRow offrow(offsel);
|
---|
440 | const TableRecord& offrec = offrow.get(0);//should be ncycles - take first
|
---|
441 | RORecordFieldPtr< Array<Float> > specoff(offrec, "SPECTRA");
|
---|
442 | RORecordFieldPtr< Array<Float> > tsysoff(offrec, "TSYS");
|
---|
443 | RORecordFieldPtr< Array<uChar> > flagoff(offrec, "FLAGTRA");
|
---|
444 | Float tsysoffscalar = (*tsysoff)(IPosition(1,0));
|
---|
445 | Vector<Float> specon, tsyson;
|
---|
446 | outtsysCol.get(i, tsyson);
|
---|
447 | outspecCol.get(i, specon);
|
---|
448 | Vector<uChar> flagon;
|
---|
449 | outflagCol.get(i, flagon);
|
---|
450 | MaskedArray<Float> mon = maskedArray(specon, flagon);
|
---|
451 | MaskedArray<Float> moff = maskedArray(*specoff, *flagoff);
|
---|
452 | MaskedArray<Float> quot = (tsysoffscalar * mon / moff);
|
---|
453 | if (preserve) {
|
---|
454 | quot -= tsysoffscalar;
|
---|
455 | } else {
|
---|
456 | quot -= tsyson[0];
|
---|
457 | }
|
---|
458 | outspecCol.put(i, quot.getArray());
|
---|
459 | outflagCol.put(i, flagsFromMA(quot));
|
---|
460 | }
|
---|
461 | ++sit;
|
---|
462 | ++s2it;
|
---|
463 | // take the first off for each on scan which doesn't have a
|
---|
464 | // matching off scan
|
---|
465 | // non <= noff: matching pairs, non > noff matching pairs then first off
|
---|
466 | if ( s2it.pastEnd() ) s2it.reset();
|
---|
467 | }
|
---|
468 | return out;
|
---|
469 | }
|
---|
470 |
|
---|
471 |
|
---|
472 | CountedPtr< Scantable > STMath::freqSwitch( const CountedPtr< Scantable >& in )
|
---|
473 | {
|
---|
474 | // make copy or reference
|
---|
475 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
476 | Table& tout = out->table();
|
---|
477 | Block<String> cols(4);
|
---|
478 | cols[0] = String("SCANNO");
|
---|
479 | cols[1] = String("CYCLENO");
|
---|
480 | cols[2] = String("BEAMNO");
|
---|
481 | cols[3] = String("POLNO");
|
---|
482 | TableIterator iter(tout, cols);
|
---|
483 | while (!iter.pastEnd()) {
|
---|
484 | Table subt = iter.table();
|
---|
485 | // this should leave us with two rows for the two IFs....if not ignore
|
---|
486 | if (subt.nrow() != 2 ) {
|
---|
487 | continue;
|
---|
488 | }
|
---|
489 | ArrayColumn<Float> specCol(subt, "SPECTRA");
|
---|
490 | ArrayColumn<Float> tsysCol(subt, "TSYS");
|
---|
491 | ArrayColumn<uChar> flagCol(subt, "FLAGTRA");
|
---|
492 | Vector<Float> onspec,offspec, ontsys, offtsys;
|
---|
493 | Vector<uChar> onflag, offflag;
|
---|
494 | tsysCol.get(0, ontsys); tsysCol.get(1, offtsys);
|
---|
495 | specCol.get(0, onspec); specCol.get(1, offspec);
|
---|
496 | flagCol.get(0, onflag); flagCol.get(1, offflag);
|
---|
497 | MaskedArray<Float> on = maskedArray(onspec, onflag);
|
---|
498 | MaskedArray<Float> off = maskedArray(offspec, offflag);
|
---|
499 | MaskedArray<Float> oncopy = on.copy();
|
---|
500 |
|
---|
501 | on /= off; on -= 1.0f;
|
---|
502 | on *= ontsys[0];
|
---|
503 | off /= oncopy; off -= 1.0f;
|
---|
504 | off *= offtsys[0];
|
---|
505 | specCol.put(0, on.getArray());
|
---|
506 | const Vector<Bool>& m0 = on.getMask();
|
---|
507 | Vector<uChar> flags0(m0.shape());
|
---|
508 | convertArray(flags0, !m0);
|
---|
509 | flagCol.put(0, flags0);
|
---|
510 |
|
---|
511 | specCol.put(1, off.getArray());
|
---|
512 | const Vector<Bool>& m1 = off.getMask();
|
---|
513 | Vector<uChar> flags1(m1.shape());
|
---|
514 | convertArray(flags1, !m1);
|
---|
515 | flagCol.put(1, flags1);
|
---|
516 | ++iter;
|
---|
517 | }
|
---|
518 |
|
---|
519 | return out;
|
---|
520 | }
|
---|
521 |
|
---|
522 | std::vector< float > STMath::statistic( const CountedPtr< Scantable > & in,
|
---|
523 | const std::vector< bool > & mask,
|
---|
524 | const std::string& which )
|
---|
525 | {
|
---|
526 |
|
---|
527 | Vector<Bool> m(mask);
|
---|
528 | const Table& tab = in->table();
|
---|
529 | ROArrayColumn<Float> specCol(tab, "SPECTRA");
|
---|
530 | ROArrayColumn<uChar> flagCol(tab, "FLAGTRA");
|
---|
531 | std::vector<float> out;
|
---|
532 | for (uInt i=0; i < tab.nrow(); ++i ) {
|
---|
533 | Vector<Float> spec; specCol.get(i, spec);
|
---|
534 | Vector<uChar> flag; flagCol.get(i, flag);
|
---|
535 | MaskedArray<Float> ma = maskedArray(spec, flag);
|
---|
536 | float outstat = 0.0;
|
---|
537 | if ( spec.nelements() == m.nelements() ) {
|
---|
538 | outstat = mathutil::statistics(which, ma(m));
|
---|
539 | } else {
|
---|
540 | outstat = mathutil::statistics(which, ma);
|
---|
541 | }
|
---|
542 | out.push_back(outstat);
|
---|
543 | }
|
---|
544 | return out;
|
---|
545 | }
|
---|
546 |
|
---|
547 | CountedPtr< Scantable > STMath::bin( const CountedPtr< Scantable > & in,
|
---|
548 | int width )
|
---|
549 | {
|
---|
550 | if ( !in->getSelection().empty() ) throw(AipsError("Can't bin subset of the data."));
|
---|
551 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
552 | Table& tout = out->table();
|
---|
553 | out->frequencies().rescale(width, "BIN");
|
---|
554 | ArrayColumn<Float> specCol(tout, "SPECTRA");
|
---|
555 | ArrayColumn<uChar> flagCol(tout, "FLAGTRA");
|
---|
556 | for (uInt i=0; i < tout.nrow(); ++i ) {
|
---|
557 | MaskedArray<Float> main = maskedArray(specCol(i), flagCol(i));
|
---|
558 | MaskedArray<Float> maout;
|
---|
559 | LatticeUtilities::bin(maout, main, 0, Int(width));
|
---|
560 | /// @todo implement channel based tsys binning
|
---|
561 | specCol.put(i, maout.getArray());
|
---|
562 | flagCol.put(i, flagsFromMA(maout));
|
---|
563 | // take only the first binned spectrum's length for the deprecated
|
---|
564 | // global header item nChan
|
---|
565 | if (i==0) tout.rwKeywordSet().define(String("nChan"),
|
---|
566 | Int(maout.getArray().nelements()));
|
---|
567 | }
|
---|
568 | return out;
|
---|
569 | }
|
---|
570 |
|
---|
571 | CountedPtr< Scantable > STMath::resample( const CountedPtr< Scantable >& in,
|
---|
572 | const std::string& method,
|
---|
573 | float width )
|
---|
574 | //
|
---|
575 | // Should add the possibility of width being specified in km/s. This means
|
---|
576 | // that for each freqID (SpectralCoordinate) we will need to convert to an
|
---|
577 | // average channel width (say at the reference pixel). Then we would need
|
---|
578 | // to be careful to make sure each spectrum (of different freqID)
|
---|
579 | // is the same length.
|
---|
580 | //
|
---|
581 | {
|
---|
582 | //InterpolateArray1D<Double,Float>::InterpolationMethod interp;
|
---|
583 | Int interpMethod(stringToIMethod(method));
|
---|
584 |
|
---|
585 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
586 | Table& tout = out->table();
|
---|
587 |
|
---|
588 | // Resample SpectralCoordinates (one per freqID)
|
---|
589 | out->frequencies().rescale(width, "RESAMPLE");
|
---|
590 | TableIterator iter(tout, "IFNO");
|
---|
591 | TableRow row(tout);
|
---|
592 | while ( !iter.pastEnd() ) {
|
---|
593 | Table tab = iter.table();
|
---|
594 | ArrayColumn<Float> specCol(tab, "SPECTRA");
|
---|
595 | //ArrayColumn<Float> tsysCol(tout, "TSYS");
|
---|
596 | ArrayColumn<uChar> flagCol(tab, "FLAGTRA");
|
---|
597 | Vector<Float> spec;
|
---|
598 | Vector<uChar> flag;
|
---|
599 | specCol.get(0,spec); // the number of channels should be constant per IF
|
---|
600 | uInt nChanIn = spec.nelements();
|
---|
601 | Vector<Float> xIn(nChanIn); indgen(xIn);
|
---|
602 | Int fac = Int(nChanIn/width);
|
---|
603 | Vector<Float> xOut(fac+10); // 10 to be safe - resize later
|
---|
604 | uInt k = 0;
|
---|
605 | Float x = 0.0;
|
---|
606 | while (x < Float(nChanIn) ) {
|
---|
607 | xOut(k) = x;
|
---|
608 | k++;
|
---|
609 | x += width;
|
---|
610 | }
|
---|
611 | uInt nChanOut = k;
|
---|
612 | xOut.resize(nChanOut, True);
|
---|
613 | // process all rows for this IFNO
|
---|
614 | Vector<Float> specOut;
|
---|
615 | Vector<Bool> maskOut;
|
---|
616 | Vector<uChar> flagOut;
|
---|
617 | for (uInt i=0; i < tab.nrow(); ++i) {
|
---|
618 | specCol.get(i, spec);
|
---|
619 | flagCol.get(i, flag);
|
---|
620 | Vector<Bool> mask(flag.nelements());
|
---|
621 | convertArray(mask, flag);
|
---|
622 |
|
---|
623 | IPosition shapeIn(spec.shape());
|
---|
624 | //sh.nchan = nChanOut;
|
---|
625 | InterpolateArray1D<Float,Float>::interpolate(specOut, maskOut, xOut,
|
---|
626 | xIn, spec, mask,
|
---|
627 | interpMethod, True, True);
|
---|
628 | /// @todo do the same for channel based Tsys
|
---|
629 | flagOut.resize(maskOut.nelements());
|
---|
630 | convertArray(flagOut, maskOut);
|
---|
631 | specCol.put(i, specOut);
|
---|
632 | flagCol.put(i, flagOut);
|
---|
633 | }
|
---|
634 | ++iter;
|
---|
635 | }
|
---|
636 |
|
---|
637 | return out;
|
---|
638 | }
|
---|
639 |
|
---|
640 | STMath::imethod STMath::stringToIMethod(const std::string& in)
|
---|
641 | {
|
---|
642 | static STMath::imap lookup;
|
---|
643 |
|
---|
644 | // initialize the lookup table if necessary
|
---|
645 | if ( lookup.empty() ) {
|
---|
646 | lookup["nearest"] = InterpolateArray1D<Double,Float>::nearestNeighbour;
|
---|
647 | lookup["linear"] = InterpolateArray1D<Double,Float>::linear;
|
---|
648 | lookup["cubic"] = InterpolateArray1D<Double,Float>::cubic;
|
---|
649 | lookup["spline"] = InterpolateArray1D<Double,Float>::spline;
|
---|
650 | }
|
---|
651 |
|
---|
652 | STMath::imap::const_iterator iter = lookup.find(in);
|
---|
653 |
|
---|
654 | if ( lookup.end() == iter ) {
|
---|
655 | std::string message = in;
|
---|
656 | message += " is not a valid interpolation mode";
|
---|
657 | throw(AipsError(message));
|
---|
658 | }
|
---|
659 | return iter->second;
|
---|
660 | }
|
---|
661 |
|
---|
662 | WeightType STMath::stringToWeight(const std::string& in)
|
---|
663 | {
|
---|
664 | static std::map<std::string, WeightType> lookup;
|
---|
665 |
|
---|
666 | // initialize the lookup table if necessary
|
---|
667 | if ( lookup.empty() ) {
|
---|
668 | lookup["NONE"] = asap::NONE;
|
---|
669 | lookup["TINT"] = asap::TINT;
|
---|
670 | lookup["TINTSYS"] = asap::TINTSYS;
|
---|
671 | lookup["TSYS"] = asap::TSYS;
|
---|
672 | lookup["VAR"] = asap::VAR;
|
---|
673 | }
|
---|
674 |
|
---|
675 | std::map<std::string, WeightType>::const_iterator iter = lookup.find(in);
|
---|
676 |
|
---|
677 | if ( lookup.end() == iter ) {
|
---|
678 | std::string message = in;
|
---|
679 | message += " is not a valid weighting mode";
|
---|
680 | throw(AipsError(message));
|
---|
681 | }
|
---|
682 | return iter->second;
|
---|
683 | }
|
---|
684 |
|
---|
685 | CountedPtr< Scantable > STMath::gainElevation( const CountedPtr< Scantable >& in,
|
---|
686 | const vector< float > & coeff,
|
---|
687 | const std::string & filename,
|
---|
688 | const std::string& method)
|
---|
689 | {
|
---|
690 | // Get elevation data from Scantable and convert to degrees
|
---|
691 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
692 | Table& tab = out->table();
|
---|
693 | ROScalarColumn<Float> elev(tab, "ELEVATION");
|
---|
694 | Vector<Float> x = elev.getColumn();
|
---|
695 | x *= Float(180 / C::pi); // Degrees
|
---|
696 |
|
---|
697 | Vector<Float> coeffs(coeff);
|
---|
698 | const uInt nc = coeffs.nelements();
|
---|
699 | if ( filename.length() > 0 && nc > 0 ) {
|
---|
700 | throw(AipsError("You must choose either polynomial coefficients or an ascii file, not both"));
|
---|
701 | }
|
---|
702 |
|
---|
703 | // Correct
|
---|
704 | if ( nc > 0 || filename.length() == 0 ) {
|
---|
705 | // Find instrument
|
---|
706 | Bool throwit = True;
|
---|
707 | Instrument inst =
|
---|
708 | STAttr::convertInstrument(tab.keywordSet().asString("AntennaName"),
|
---|
709 | throwit);
|
---|
710 |
|
---|
711 | // Set polynomial
|
---|
712 | Polynomial<Float>* ppoly = 0;
|
---|
713 | Vector<Float> coeff;
|
---|
714 | String msg;
|
---|
715 | if ( nc > 0 ) {
|
---|
716 | ppoly = new Polynomial<Float>(nc);
|
---|
717 | coeff = coeffs;
|
---|
718 | msg = String("user");
|
---|
719 | } else {
|
---|
720 | STAttr sdAttr;
|
---|
721 | coeff = sdAttr.gainElevationPoly(inst);
|
---|
722 | ppoly = new Polynomial<Float>(3);
|
---|
723 | msg = String("built in");
|
---|
724 | }
|
---|
725 |
|
---|
726 | if ( coeff.nelements() > 0 ) {
|
---|
727 | ppoly->setCoefficients(coeff);
|
---|
728 | } else {
|
---|
729 | delete ppoly;
|
---|
730 | throw(AipsError("There is no known gain-elevation polynomial known for this instrument"));
|
---|
731 | }
|
---|
732 | ostringstream oss;
|
---|
733 | oss << "Making polynomial correction with " << msg << " coefficients:" << endl;
|
---|
734 | oss << " " << coeff;
|
---|
735 | pushLog(String(oss));
|
---|
736 | const uInt nrow = tab.nrow();
|
---|
737 | Vector<Float> factor(nrow);
|
---|
738 | for ( uInt i=0; i < nrow; ++i ) {
|
---|
739 | factor[i] = 1.0 / (*ppoly)(x[i]);
|
---|
740 | }
|
---|
741 | delete ppoly;
|
---|
742 | scaleByVector(tab, factor, true);
|
---|
743 |
|
---|
744 | } else {
|
---|
745 | // Read and correct
|
---|
746 | pushLog("Making correction from ascii Table");
|
---|
747 | scaleFromAsciiTable(tab, filename, method, x, true);
|
---|
748 | }
|
---|
749 | return out;
|
---|
750 | }
|
---|
751 |
|
---|
752 | void STMath::scaleFromAsciiTable(Table& in, const std::string& filename,
|
---|
753 | const std::string& method,
|
---|
754 | const Vector<Float>& xout, bool dotsys)
|
---|
755 | {
|
---|
756 |
|
---|
757 | // Read gain-elevation ascii file data into a Table.
|
---|
758 |
|
---|
759 | String formatString;
|
---|
760 | Table tbl = readAsciiTable(formatString, Table::Memory, filename, "", "", False);
|
---|
761 | scaleFromTable(in, tbl, method, xout, dotsys);
|
---|
762 | }
|
---|
763 |
|
---|
764 | void STMath::scaleFromTable(Table& in,
|
---|
765 | const Table& table,
|
---|
766 | const std::string& method,
|
---|
767 | const Vector<Float>& xout, bool dotsys)
|
---|
768 | {
|
---|
769 |
|
---|
770 | ROScalarColumn<Float> geElCol(table, "ELEVATION");
|
---|
771 | ROScalarColumn<Float> geFacCol(table, "FACTOR");
|
---|
772 | Vector<Float> xin = geElCol.getColumn();
|
---|
773 | Vector<Float> yin = geFacCol.getColumn();
|
---|
774 | Vector<Bool> maskin(xin.nelements(),True);
|
---|
775 |
|
---|
776 | // Interpolate (and extrapolate) with desired method
|
---|
777 |
|
---|
778 | InterpolateArray1D<Double,Float>::InterpolationMethod interp = stringToIMethod(method);
|
---|
779 |
|
---|
780 | Vector<Float> yout;
|
---|
781 | Vector<Bool> maskout;
|
---|
782 | InterpolateArray1D<Float,Float>::interpolate(yout, maskout, xout,
|
---|
783 | xin, yin, maskin, interp,
|
---|
784 | True, True);
|
---|
785 |
|
---|
786 | scaleByVector(in, Float(1.0)/yout, dotsys);
|
---|
787 | }
|
---|
788 |
|
---|
789 | void STMath::scaleByVector( Table& in,
|
---|
790 | const Vector< Float >& factor,
|
---|
791 | bool dotsys )
|
---|
792 | {
|
---|
793 | uInt nrow = in.nrow();
|
---|
794 | if ( factor.nelements() != nrow ) {
|
---|
795 | throw(AipsError("factors.nelements() != table.nelements()"));
|
---|
796 | }
|
---|
797 | ArrayColumn<Float> specCol(in, "SPECTRA");
|
---|
798 | ArrayColumn<uChar> flagCol(in, "FLAGTRA");
|
---|
799 | ArrayColumn<Float> tsysCol(in, "TSYS");
|
---|
800 | for (uInt i=0; i < nrow; ++i) {
|
---|
801 | MaskedArray<Float> ma = maskedArray(specCol(i), flagCol(i));
|
---|
802 | ma *= factor[i];
|
---|
803 | specCol.put(i, ma.getArray());
|
---|
804 | flagCol.put(i, flagsFromMA(ma));
|
---|
805 | if ( dotsys ) {
|
---|
806 | Vector<Float> tsys = tsysCol(i);
|
---|
807 | tsys *= factor[i];
|
---|
808 | tsysCol.put(i,tsys);
|
---|
809 | }
|
---|
810 | }
|
---|
811 | }
|
---|
812 |
|
---|
813 | CountedPtr< Scantable > STMath::convertFlux( const CountedPtr< Scantable >& in,
|
---|
814 | float d, float etaap,
|
---|
815 | float jyperk )
|
---|
816 | {
|
---|
817 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
818 | Table& tab = in->table();
|
---|
819 | Unit fluxUnit(tab.keywordSet().asString("FluxUnit"));
|
---|
820 | Unit K(String("K"));
|
---|
821 | Unit JY(String("Jy"));
|
---|
822 |
|
---|
823 | bool tokelvin = true;
|
---|
824 | Double cfac = 1.0;
|
---|
825 |
|
---|
826 | if ( fluxUnit == JY ) {
|
---|
827 | pushLog("Converting to K");
|
---|
828 | Quantum<Double> t(1.0,fluxUnit);
|
---|
829 | Quantum<Double> t2 = t.get(JY);
|
---|
830 | cfac = (t2 / t).getValue(); // value to Jy
|
---|
831 |
|
---|
832 | tokelvin = true;
|
---|
833 | out->setFluxUnit("K");
|
---|
834 | } else if ( fluxUnit == K ) {
|
---|
835 | pushLog("Converting to Jy");
|
---|
836 | Quantum<Double> t(1.0,fluxUnit);
|
---|
837 | Quantum<Double> t2 = t.get(K);
|
---|
838 | cfac = (t2 / t).getValue(); // value to K
|
---|
839 |
|
---|
840 | tokelvin = false;
|
---|
841 | out->setFluxUnit("Jy");
|
---|
842 | } else {
|
---|
843 | throw(AipsError("Unrecognized brightness units in Table - must be consistent with Jy or K"));
|
---|
844 | }
|
---|
845 | // Make sure input values are converted to either Jy or K first...
|
---|
846 | Float factor = cfac;
|
---|
847 |
|
---|
848 | // Select method
|
---|
849 | if (jyperk > 0.0) {
|
---|
850 | factor *= jyperk;
|
---|
851 | if ( tokelvin ) factor = 1.0 / jyperk;
|
---|
852 | ostringstream oss;
|
---|
853 | oss << "Jy/K = " << jyperk;
|
---|
854 | pushLog(String(oss));
|
---|
855 | Vector<Float> factors(tab.nrow(), factor);
|
---|
856 | scaleByVector(tab,factors, false);
|
---|
857 | } else if ( etaap > 0.0) {
|
---|
858 | Instrument inst =
|
---|
859 | STAttr::convertInstrument(tab.keywordSet().asString("AntennaName"), True);
|
---|
860 | STAttr sda;
|
---|
861 | if (d < 0) d = sda.diameter(inst);
|
---|
862 | jyperk = STAttr::findJyPerK(etaap, d);
|
---|
863 | ostringstream oss;
|
---|
864 | oss << "Jy/K = " << jyperk;
|
---|
865 | pushLog(String(oss));
|
---|
866 | factor *= jyperk;
|
---|
867 | if ( tokelvin ) {
|
---|
868 | factor = 1.0 / factor;
|
---|
869 | }
|
---|
870 | Vector<Float> factors(tab.nrow(), factor);
|
---|
871 | scaleByVector(tab, factors, False);
|
---|
872 | } else {
|
---|
873 |
|
---|
874 | // OK now we must deal with automatic look up of values.
|
---|
875 | // We must also deal with the fact that the factors need
|
---|
876 | // to be computed per IF and may be different and may
|
---|
877 | // change per integration.
|
---|
878 |
|
---|
879 | pushLog("Looking up conversion factors");
|
---|
880 | convertBrightnessUnits(out, tokelvin, cfac);
|
---|
881 | }
|
---|
882 |
|
---|
883 | return out;
|
---|
884 | }
|
---|
885 |
|
---|
886 | void STMath::convertBrightnessUnits( CountedPtr<Scantable>& in,
|
---|
887 | bool tokelvin, float cfac )
|
---|
888 | {
|
---|
889 | Table& table = in->table();
|
---|
890 | Instrument inst =
|
---|
891 | STAttr::convertInstrument(table.keywordSet().asString("AntennaName"), True);
|
---|
892 | TableIterator iter(table, "FREQ_ID");
|
---|
893 | STFrequencies stfreqs = in->frequencies();
|
---|
894 | STAttr sdAtt;
|
---|
895 | while (!iter.pastEnd()) {
|
---|
896 | Table tab = iter.table();
|
---|
897 | ArrayColumn<Float> specCol(tab, "SPECTRA");
|
---|
898 | ArrayColumn<uChar> flagCol(tab, "FLAGTRA");
|
---|
899 | ROScalarColumn<uInt> freqidCol(tab, "FREQ_ID");
|
---|
900 | MEpoch::ROScalarColumn timeCol(tab, "TIME");
|
---|
901 |
|
---|
902 | uInt freqid; freqidCol.get(0, freqid);
|
---|
903 | Vector<Float> tmpspec; specCol.get(0, tmpspec);
|
---|
904 | // STAttr.JyPerK has a Vector interface... change sometime.
|
---|
905 | Vector<Float> freqs(1,stfreqs.getRefFreq(freqid, tmpspec.nelements()));
|
---|
906 | for ( uInt i=0; i<tab.nrow(); ++i) {
|
---|
907 | Float jyperk = (sdAtt.JyPerK(inst, timeCol(i), freqs))[0];
|
---|
908 | Float factor = cfac * jyperk;
|
---|
909 | if ( tokelvin ) factor = Float(1.0) / factor;
|
---|
910 | MaskedArray<Float> ma = maskedArray(specCol(i), flagCol(i));
|
---|
911 | ma *= factor;
|
---|
912 | specCol.put(i, ma.getArray());
|
---|
913 | flagCol.put(i, flagsFromMA(ma));
|
---|
914 | }
|
---|
915 | ++iter;
|
---|
916 | }
|
---|
917 | }
|
---|
918 |
|
---|
919 | CountedPtr< Scantable > STMath::opacity( const CountedPtr< Scantable > & in,
|
---|
920 | float tau )
|
---|
921 | {
|
---|
922 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
923 |
|
---|
924 | Table tab = out->table();
|
---|
925 | ROScalarColumn<Float> elev(tab, "ELEVATION");
|
---|
926 | ArrayColumn<Float> specCol(tab, "SPECTRA");
|
---|
927 | ArrayColumn<uChar> flagCol(tab, "FLAGTRA");
|
---|
928 | for ( uInt i=0; i<tab.nrow(); ++i) {
|
---|
929 | Float zdist = Float(C::pi_2) - elev(i);
|
---|
930 | Float factor = exp(tau)/cos(zdist);
|
---|
931 | MaskedArray<Float> ma = maskedArray(specCol(i), flagCol(i));
|
---|
932 | ma *= factor;
|
---|
933 | specCol.put(i, ma.getArray());
|
---|
934 | flagCol.put(i, flagsFromMA(ma));
|
---|
935 | }
|
---|
936 | return out;
|
---|
937 | }
|
---|
938 |
|
---|
939 | CountedPtr< Scantable > STMath::smooth( const CountedPtr< Scantable >& in,
|
---|
940 | const std::string& kernel, float width )
|
---|
941 | {
|
---|
942 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
943 | Table& table = out->table();
|
---|
944 | VectorKernel::KernelTypes type = VectorKernel::toKernelType(kernel);
|
---|
945 | // same IFNO should have same no of channels
|
---|
946 | // this saves overhead
|
---|
947 | TableIterator iter(table, "IFNO");
|
---|
948 | while (!iter.pastEnd()) {
|
---|
949 | Table tab = iter.table();
|
---|
950 | ArrayColumn<Float> specCol(tab, "SPECTRA");
|
---|
951 | ArrayColumn<uChar> flagCol(tab, "FLAGTRA");
|
---|
952 | Vector<Float> tmpspec; specCol.get(0, tmpspec);
|
---|
953 | uInt nchan = tmpspec.nelements();
|
---|
954 | Vector<Float> kvec = VectorKernel::make(type, width, nchan, True, False);
|
---|
955 | Convolver<Float> conv(kvec, IPosition(1,nchan));
|
---|
956 | Vector<Float> spec;
|
---|
957 | Vector<uChar> flag;
|
---|
958 | for ( uInt i=0; i<tab.nrow(); ++i) {
|
---|
959 | specCol.get(i, spec);
|
---|
960 | flagCol.get(i, flag);
|
---|
961 | Vector<Bool> mask(flag.nelements());
|
---|
962 | convertArray(mask, flag);
|
---|
963 | Vector<Float> specout;
|
---|
964 | if ( type == VectorKernel::HANNING ) {
|
---|
965 | Vector<Bool> maskout;
|
---|
966 | mathutil::hanning(specout, maskout, spec , !mask);
|
---|
967 | convertArray(flag, !maskout);
|
---|
968 | flagCol.put(i, flag);
|
---|
969 | specCol.put(i, specout);
|
---|
970 | } else {
|
---|
971 | mathutil::replaceMaskByZero(specout, mask);
|
---|
972 | conv.linearConv(specout, spec);
|
---|
973 | specCol.put(i, specout);
|
---|
974 | }
|
---|
975 | }
|
---|
976 | ++iter;
|
---|
977 | }
|
---|
978 | return out;
|
---|
979 | }
|
---|
980 |
|
---|
981 | CountedPtr< Scantable >
|
---|
982 | STMath::merge( const std::vector< CountedPtr < Scantable > >& in )
|
---|
983 | {
|
---|
984 | if ( in.size() < 2 ) {
|
---|
985 | throw(AipsError("Need at least two scantables to perform a merge."));
|
---|
986 | }
|
---|
987 | std::vector<CountedPtr < Scantable > >::const_iterator it = in.begin();
|
---|
988 | bool insitu = insitu_;
|
---|
989 | setInsitu(false);
|
---|
990 | CountedPtr< Scantable > out = getScantable(*it, false);
|
---|
991 | setInsitu(insitu);
|
---|
992 | Table& tout = out->table();
|
---|
993 | ScalarColumn<uInt> freqidcol(tout,"FREQ_ID"), molidcol(tout, "MOLECULE_ID");
|
---|
994 | ScalarColumn<uInt> scannocol(tout,"SCANNO"), focusidcol(tout,"FOCUS_ID");
|
---|
995 | // Renumber SCANNO to be 0-based
|
---|
996 | Vector<uInt> scannos = scannocol.getColumn();
|
---|
997 | uInt offset = min(scannos);
|
---|
998 | scannos -= offset;
|
---|
999 | scannocol.putColumn(scannos);
|
---|
1000 | uInt newscanno = max(scannos)+1;
|
---|
1001 | ++it;
|
---|
1002 | while ( it != in.end() ){
|
---|
1003 | if ( ! (*it)->conformant(*out) ) {
|
---|
1004 | // log message: "ignoring scantable i, as it isn't
|
---|
1005 | // conformant with the other(s)"
|
---|
1006 | cerr << "oh oh" << endl;
|
---|
1007 | ++it;
|
---|
1008 | continue;
|
---|
1009 | }
|
---|
1010 | out->appendToHistoryTable((*it)->history());
|
---|
1011 | const Table& tab = (*it)->table();
|
---|
1012 | TableIterator scanit(tab, "SCANNO");
|
---|
1013 | while (!scanit.pastEnd()) {
|
---|
1014 | TableIterator freqit(scanit.table(), "FREQ_ID");
|
---|
1015 | while ( !freqit.pastEnd() ) {
|
---|
1016 | Table thetab = freqit.table();
|
---|
1017 | uInt nrow = tout.nrow();
|
---|
1018 | //tout.addRow(thetab.nrow());
|
---|
1019 | TableCopy::copyRows(tout, thetab, nrow, 0, thetab.nrow());
|
---|
1020 | ROTableRow row(thetab);
|
---|
1021 | for ( uInt i=0; i<thetab.nrow(); ++i) {
|
---|
1022 | uInt k = nrow+i;
|
---|
1023 | scannocol.put(k, newscanno);
|
---|
1024 | const TableRecord& rec = row.get(i);
|
---|
1025 | Double rv,rp,inc;
|
---|
1026 | (*it)->frequencies().getEntry(rp, rv, inc, rec.asuInt("FREQ_ID"));
|
---|
1027 | uInt id;
|
---|
1028 | id = out->frequencies().addEntry(rp, rv, inc);
|
---|
1029 | freqidcol.put(k,id);
|
---|
1030 | String name,fname;Double rf;
|
---|
1031 | (*it)->molecules().getEntry(rf, name, fname, rec.asuInt("MOLECULE_ID"));
|
---|
1032 | id = out->molecules().addEntry(rf, name, fname);
|
---|
1033 | molidcol.put(k, id);
|
---|
1034 | Float frot,fax,ftan,fhand,fmount,fuser, fxy, fxyp;
|
---|
1035 | (*it)->focus().getEntry(fax, ftan, frot, fhand,
|
---|
1036 | fmount,fuser, fxy, fxyp,
|
---|
1037 | rec.asuInt("FOCUS_ID"));
|
---|
1038 | id = out->focus().addEntry(fax, ftan, frot, fhand,
|
---|
1039 | fmount,fuser, fxy, fxyp);
|
---|
1040 | focusidcol.put(k, id);
|
---|
1041 | }
|
---|
1042 | ++freqit;
|
---|
1043 | }
|
---|
1044 | ++newscanno;
|
---|
1045 | ++scanit;
|
---|
1046 | }
|
---|
1047 | ++it;
|
---|
1048 | }
|
---|
1049 | return out;
|
---|
1050 | }
|
---|
1051 |
|
---|
1052 | CountedPtr< Scantable >
|
---|
1053 | STMath::invertPhase( const CountedPtr < Scantable >& in )
|
---|
1054 | {
|
---|
1055 | return applyToPol(in, &STPol::invertPhase, Float(0.0));
|
---|
1056 | }
|
---|
1057 |
|
---|
1058 | CountedPtr< Scantable >
|
---|
1059 | STMath::rotateXYPhase( const CountedPtr < Scantable >& in, float phase )
|
---|
1060 | {
|
---|
1061 | return applyToPol(in, &STPol::rotatePhase, Float(phase));
|
---|
1062 | }
|
---|
1063 |
|
---|
1064 | CountedPtr< Scantable >
|
---|
1065 | STMath::rotateLinPolPhase( const CountedPtr < Scantable >& in, float phase )
|
---|
1066 | {
|
---|
1067 | return applyToPol(in, &STPol::rotateLinPolPhase, Float(phase));
|
---|
1068 | }
|
---|
1069 |
|
---|
1070 | CountedPtr< Scantable > STMath::applyToPol( const CountedPtr<Scantable>& in,
|
---|
1071 | STPol::polOperation fptr,
|
---|
1072 | Float phase )
|
---|
1073 | {
|
---|
1074 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
1075 | Table& tout = out->table();
|
---|
1076 | Block<String> cols(4);
|
---|
1077 | cols[0] = String("SCANNO");
|
---|
1078 | cols[1] = String("BEAMNO");
|
---|
1079 | cols[2] = String("IFNO");
|
---|
1080 | cols[3] = String("CYCLENO");
|
---|
1081 | TableIterator iter(tout, cols);
|
---|
1082 | STPol* stpol = STPol::getPolClass(out->factories_, out->getPolType() );
|
---|
1083 | while (!iter.pastEnd()) {
|
---|
1084 | Table t = iter.table();
|
---|
1085 | ArrayColumn<Float> speccol(t, "SPECTRA");
|
---|
1086 | ScalarColumn<uInt> focidcol(t, "FOCUS_ID");
|
---|
1087 | ScalarColumn<Float> parancol(t, "PARANGLE");
|
---|
1088 | Matrix<Float> pols = speccol.getColumn();
|
---|
1089 | try {
|
---|
1090 | stpol->setSpectra(pols);
|
---|
1091 | Float fang,fhand,parang;
|
---|
1092 | fang = in->focusTable_.getTotalFeedAngle(focidcol(0));
|
---|
1093 | fhand = in->focusTable_.getFeedHand(focidcol(0));
|
---|
1094 | parang = parancol(0);
|
---|
1095 | /// @todo re-enable this
|
---|
1096 | // disable total feed angle to support paralactifying Caswell style
|
---|
1097 | stpol->setPhaseCorrections(parang, -parang, fhand);
|
---|
1098 | (stpol->*fptr)(phase);
|
---|
1099 | speccol.putColumn(stpol->getSpectra());
|
---|
1100 | Matrix<Float> tmp = stpol->getSpectra();
|
---|
1101 | } catch (AipsError& e) {
|
---|
1102 | delete stpol;stpol=0;
|
---|
1103 | throw(e);
|
---|
1104 | }
|
---|
1105 | ++iter;
|
---|
1106 | }
|
---|
1107 | delete stpol;stpol=0;
|
---|
1108 | return out;
|
---|
1109 | }
|
---|
1110 |
|
---|
1111 | CountedPtr< Scantable >
|
---|
1112 | STMath::swapPolarisations( const CountedPtr< Scantable > & in )
|
---|
1113 | {
|
---|
1114 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
1115 | Table& tout = out->table();
|
---|
1116 | Table t0 = tout(tout.col("POLNO") == 0);
|
---|
1117 | Table t1 = tout(tout.col("POLNO") == 1);
|
---|
1118 | if ( t0.nrow() != t1.nrow() )
|
---|
1119 | throw(AipsError("Inconsistent number of polarisations"));
|
---|
1120 | ArrayColumn<Float> speccol0(t0, "SPECTRA");
|
---|
1121 | ArrayColumn<uChar> flagcol0(t0, "FLAGTRA");
|
---|
1122 | ArrayColumn<Float> speccol1(t1, "SPECTRA");
|
---|
1123 | ArrayColumn<uChar> flagcol1(t1, "FLAGTRA");
|
---|
1124 | Matrix<Float> s0 = speccol0.getColumn();
|
---|
1125 | Matrix<uChar> f0 = flagcol0.getColumn();
|
---|
1126 | speccol0.putColumn(speccol1.getColumn());
|
---|
1127 | flagcol0.putColumn(flagcol1.getColumn());
|
---|
1128 | speccol1.putColumn(s0);
|
---|
1129 | flagcol1.putColumn(f0);
|
---|
1130 | return out;
|
---|
1131 | }
|
---|
1132 |
|
---|
1133 | CountedPtr< Scantable >
|
---|
1134 | STMath::averagePolarisations( const CountedPtr< Scantable > & in,
|
---|
1135 | const std::vector<bool>& mask,
|
---|
1136 | const std::string& weight )
|
---|
1137 | {
|
---|
1138 | if (in->npol() < 2 )
|
---|
1139 | throw(AipsError("averagePolarisations can only be applied to two or more"
|
---|
1140 | "polarisations"));
|
---|
1141 | bool insitu = insitu_;
|
---|
1142 | setInsitu(false);
|
---|
1143 | CountedPtr< Scantable > pols = getScantable(in, true);
|
---|
1144 | setInsitu(insitu);
|
---|
1145 | Table& tout = pols->table();
|
---|
1146 | std::string taql = "SELECT FROM $1 WHERE POLNO IN [0,1]";
|
---|
1147 | Table tab = tableCommand(taql, in->table());
|
---|
1148 | if (tab.nrow() == 0 )
|
---|
1149 | throw(AipsError("Could not find any rows with POLNO==0 and POLNO==1"));
|
---|
1150 | TableCopy::copyRows(tout, tab);
|
---|
1151 | TableVector<uInt> vec(tout, "POLNO");
|
---|
1152 | vec = 0;
|
---|
1153 | pols->table_.rwKeywordSet().define("nPol", Int(1));
|
---|
1154 | pols->table_.rwKeywordSet().define("POLTYPE", String("stokes"));
|
---|
1155 | std::vector<CountedPtr<Scantable> > vpols;
|
---|
1156 | vpols.push_back(pols);
|
---|
1157 | CountedPtr< Scantable > out = average(vpols, mask, weight, "SCAN");
|
---|
1158 | return out;
|
---|
1159 | }
|
---|
1160 |
|
---|
1161 | CountedPtr< Scantable >
|
---|
1162 | STMath::averageBeams( const CountedPtr< Scantable > & in,
|
---|
1163 | const std::vector<bool>& mask,
|
---|
1164 | const std::string& weight )
|
---|
1165 | {
|
---|
1166 | bool insitu = insitu_;
|
---|
1167 | setInsitu(false);
|
---|
1168 | CountedPtr< Scantable > beams = getScantable(in, false);
|
---|
1169 | setInsitu(insitu);
|
---|
1170 | Table& tout = beams->table();
|
---|
1171 | // give all rows the same BEAMNO
|
---|
1172 | TableVector<uInt> vec(tout, "BEAMNO");
|
---|
1173 | vec = 0;
|
---|
1174 | beams->table_.rwKeywordSet().define("nBeam", Int(1));
|
---|
1175 | std::vector<CountedPtr<Scantable> > vbeams;
|
---|
1176 | vbeams.push_back(beams);
|
---|
1177 | CountedPtr< Scantable > out = average(vbeams, mask, weight, "SCAN");
|
---|
1178 | return out;
|
---|
1179 | }
|
---|
1180 |
|
---|
1181 |
|
---|
1182 | CountedPtr< Scantable >
|
---|
1183 | asap::STMath::frequencyAlign( const CountedPtr< Scantable > & in,
|
---|
1184 | const std::string & refTime,
|
---|
1185 | const std::string & method)
|
---|
1186 | {
|
---|
1187 | // clone as this is not working insitu
|
---|
1188 | bool insitu = insitu_;
|
---|
1189 | setInsitu(false);
|
---|
1190 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
1191 | setInsitu(insitu);
|
---|
1192 | Table& tout = out->table();
|
---|
1193 | // Get reference Epoch to time of first row or given String
|
---|
1194 | Unit DAY(String("d"));
|
---|
1195 | MEpoch::Ref epochRef(in->getTimeReference());
|
---|
1196 | MEpoch refEpoch;
|
---|
1197 | if (refTime.length()>0) {
|
---|
1198 | Quantum<Double> qt;
|
---|
1199 | if (MVTime::read(qt,refTime)) {
|
---|
1200 | MVEpoch mv(qt);
|
---|
1201 | refEpoch = MEpoch(mv, epochRef);
|
---|
1202 | } else {
|
---|
1203 | throw(AipsError("Invalid format for Epoch string"));
|
---|
1204 | }
|
---|
1205 | } else {
|
---|
1206 | refEpoch = in->timeCol_(0);
|
---|
1207 | }
|
---|
1208 | MPosition refPos = in->getAntennaPosition();
|
---|
1209 |
|
---|
1210 | InterpolateArray1D<Double,Float>::InterpolationMethod interp = stringToIMethod(method);
|
---|
1211 | // test if user frame is different to base frame
|
---|
1212 | if ( in->frequencies().getFrameString(true)
|
---|
1213 | == in->frequencies().getFrameString(false) ) {
|
---|
1214 | throw(AipsError("Can't convert as no output frame has been set"
|
---|
1215 | " (use set_freqframe) or it is aligned already."));
|
---|
1216 | }
|
---|
1217 | MFrequency::Types system = in->frequencies().getFrame();
|
---|
1218 | MVTime mvt(refEpoch.getValue());
|
---|
1219 | String epochout = mvt.string(MVTime::YMD) + String(" (") + refEpoch.getRefString() + String(")");
|
---|
1220 | ostringstream oss;
|
---|
1221 | oss << "Aligned at reference Epoch " << epochout
|
---|
1222 | << " in frame " << MFrequency::showType(system);
|
---|
1223 | pushLog(String(oss));
|
---|
1224 | // set up the iterator
|
---|
1225 | Block<String> cols(4);
|
---|
1226 | // select by constant direction
|
---|
1227 | cols[0] = String("SRCNAME");
|
---|
1228 | cols[1] = String("BEAMNO");
|
---|
1229 | // select by IF ( no of channels varies over this )
|
---|
1230 | cols[2] = String("IFNO");
|
---|
1231 | // select by restfrequency
|
---|
1232 | cols[3] = String("MOLECULE_ID");
|
---|
1233 | TableIterator iter(tout, cols);
|
---|
1234 | while ( !iter.pastEnd() ) {
|
---|
1235 | Table t = iter.table();
|
---|
1236 | MDirection::ROScalarColumn dirCol(t, "DIRECTION");
|
---|
1237 | TableIterator fiter(t, "FREQ_ID");
|
---|
1238 | // determine nchan from the first row. This should work as
|
---|
1239 | // we are iterating over BEAMNO and IFNO // we should have constant direction
|
---|
1240 |
|
---|
1241 | ROArrayColumn<Float> sCol(t, "SPECTRA");
|
---|
1242 | MDirection direction = dirCol(0);
|
---|
1243 | uInt nchan = sCol(0).nelements();
|
---|
1244 | while ( !fiter.pastEnd() ) {
|
---|
1245 | Table ftab = fiter.table();
|
---|
1246 | ScalarColumn<uInt> freqidCol(ftab, "FREQ_ID");
|
---|
1247 | // get the SpectralCoordinate for the freqid, which we are iterating over
|
---|
1248 | SpectralCoordinate sC = in->frequencies().getSpectralCoordinate(freqidCol(0));
|
---|
1249 | FrequencyAligner<Float> fa( sC, nchan, refEpoch,
|
---|
1250 | direction, refPos, system );
|
---|
1251 | // realign the SpectralCoordinate and put into the output Scantable
|
---|
1252 | Vector<String> units(1);
|
---|
1253 | units = String("Hz");
|
---|
1254 | Bool linear=True;
|
---|
1255 | SpectralCoordinate sc2 = fa.alignedSpectralCoordinate(linear);
|
---|
1256 | sc2.setWorldAxisUnits(units);
|
---|
1257 | uInt id = out->frequencies().addEntry(sc2.referencePixel()[0],
|
---|
1258 | sc2.referenceValue()[0],
|
---|
1259 | sc2.increment()[0]);
|
---|
1260 | TableVector<uInt> tvec(ftab, "FREQ_ID");
|
---|
1261 | tvec = id;
|
---|
1262 | // create the "global" abcissa for alignment with same FREQ_ID
|
---|
1263 | Vector<Double> abc(nchan);
|
---|
1264 | Double w;
|
---|
1265 | for (uInt i=0; i<nchan; i++) {
|
---|
1266 | sC.toWorld(w,Double(i));
|
---|
1267 | abc[i] = w;
|
---|
1268 | }
|
---|
1269 | // cache abcissa for same time stamps, so iterate over those
|
---|
1270 | TableIterator timeiter(ftab, "TIME");
|
---|
1271 | while ( !timeiter.pastEnd() ) {
|
---|
1272 | Table tab = timeiter.table();
|
---|
1273 | ArrayColumn<Float> specCol(tab, "SPECTRA");
|
---|
1274 | ArrayColumn<uChar> flagCol(tab, "FLAGTRA");
|
---|
1275 | MEpoch::ROScalarColumn timeCol(tab, "TIME");
|
---|
1276 | // use align abcissa cache after the first row
|
---|
1277 | bool first = true;
|
---|
1278 | // these rows should be just be POLNO
|
---|
1279 | for (int i=0; i<int(tab.nrow()); ++i) {
|
---|
1280 | // input values
|
---|
1281 | Vector<uChar> flag = flagCol(i);
|
---|
1282 | Vector<Bool> mask(flag.shape());
|
---|
1283 | Vector<Float> specOut, spec;
|
---|
1284 | spec = specCol(i);
|
---|
1285 | Vector<Bool> maskOut;Vector<uChar> flagOut;
|
---|
1286 | convertArray(mask, flag);
|
---|
1287 | // alignment
|
---|
1288 | Bool ok = fa.align(specOut, maskOut, abc, spec,
|
---|
1289 | mask, timeCol(i), !first,
|
---|
1290 | interp, False);
|
---|
1291 | // back into scantable
|
---|
1292 | flagOut.resize(maskOut.nelements());
|
---|
1293 | convertArray(flagOut, maskOut);
|
---|
1294 | flagCol.put(i, flagOut);
|
---|
1295 | specCol.put(i, specOut);
|
---|
1296 | // start abcissa caching
|
---|
1297 | first = false;
|
---|
1298 | }
|
---|
1299 | // next timestamp
|
---|
1300 | ++timeiter;
|
---|
1301 | }
|
---|
1302 | // next FREQ_ID
|
---|
1303 | ++fiter;
|
---|
1304 | }
|
---|
1305 | // next aligner
|
---|
1306 | ++iter;
|
---|
1307 | }
|
---|
1308 | // set this afterwards to ensure we are doing insitu correctly.
|
---|
1309 | out->frequencies().setFrame(system, true);
|
---|
1310 | return out;
|
---|
1311 | }
|
---|
1312 |
|
---|
1313 | CountedPtr<Scantable>
|
---|
1314 | asap::STMath::convertPolarisation( const CountedPtr<Scantable>& in,
|
---|
1315 | const std::string & newtype )
|
---|
1316 | {
|
---|
1317 | if (in->npol() != 2 && in->npol() != 4)
|
---|
1318 | throw(AipsError("Can only convert two or four polarisations."));
|
---|
1319 | if ( in->getPolType() == newtype )
|
---|
1320 | throw(AipsError("No need to convert."));
|
---|
1321 | if ( ! in->selector_.empty() )
|
---|
1322 | throw(AipsError("Can only convert whole scantable. Unset the selection."));
|
---|
1323 | bool insitu = insitu_;
|
---|
1324 | setInsitu(false);
|
---|
1325 | CountedPtr< Scantable > out = getScantable(in, true);
|
---|
1326 | setInsitu(insitu);
|
---|
1327 | Table& tout = out->table();
|
---|
1328 | tout.rwKeywordSet().define("POLTYPE", String(newtype));
|
---|
1329 |
|
---|
1330 | Block<String> cols(4);
|
---|
1331 | cols[0] = "SCANNO";
|
---|
1332 | cols[1] = "CYCLENO";
|
---|
1333 | cols[2] = "BEAMNO";
|
---|
1334 | cols[3] = "IFNO";
|
---|
1335 | TableIterator it(in->originalTable_, cols);
|
---|
1336 | String basetype = in->getPolType();
|
---|
1337 | STPol* stpol = STPol::getPolClass(in->factories_, basetype);
|
---|
1338 | try {
|
---|
1339 | while ( !it.pastEnd() ) {
|
---|
1340 | Table tab = it.table();
|
---|
1341 | uInt row = tab.rowNumbers()[0];
|
---|
1342 | stpol->setSpectra(in->getPolMatrix(row));
|
---|
1343 | Float fang,fhand,parang;
|
---|
1344 | fang = in->focusTable_.getTotalFeedAngle(in->mfocusidCol_(row));
|
---|
1345 | fhand = in->focusTable_.getFeedHand(in->mfocusidCol_(row));
|
---|
1346 | parang = in->paraCol_(row);
|
---|
1347 | /// @todo re-enable this
|
---|
1348 | // disable total feed angle to support paralactifying Caswell style
|
---|
1349 | stpol->setPhaseCorrections(parang, -parang, fhand);
|
---|
1350 | Int npolout = 0;
|
---|
1351 | for (uInt i=0; i<tab.nrow(); ++i) {
|
---|
1352 | Vector<Float> outvec = stpol->getSpectrum(i, newtype);
|
---|
1353 | if ( outvec.nelements() > 0 ) {
|
---|
1354 | tout.addRow();
|
---|
1355 | TableCopy::copyRows(tout, tab, tout.nrow()-1, 0, 1);
|
---|
1356 | ArrayColumn<Float> sCol(tout,"SPECTRA");
|
---|
1357 | ScalarColumn<uInt> pCol(tout,"POLNO");
|
---|
1358 | sCol.put(tout.nrow()-1 ,outvec);
|
---|
1359 | pCol.put(tout.nrow()-1 ,uInt(npolout));
|
---|
1360 | npolout++;
|
---|
1361 | }
|
---|
1362 | }
|
---|
1363 | tout.rwKeywordSet().define("nPol", npolout);
|
---|
1364 | ++it;
|
---|
1365 | }
|
---|
1366 | } catch (AipsError& e) {
|
---|
1367 | delete stpol;
|
---|
1368 | throw(e);
|
---|
1369 | }
|
---|
1370 | delete stpol;
|
---|
1371 | return out;
|
---|
1372 | }
|
---|
1373 |
|
---|
1374 | CountedPtr< Scantable >
|
---|
1375 | asap::STMath::mxExtract( const CountedPtr< Scantable > & in,
|
---|
1376 | const std::string & scantype )
|
---|
1377 | {
|
---|
1378 | bool insitu = insitu_;
|
---|
1379 | setInsitu(false);
|
---|
1380 | CountedPtr< Scantable > out = getScantable(in, true);
|
---|
1381 | setInsitu(insitu);
|
---|
1382 | Table& tout = out->table();
|
---|
1383 | std::string taql = "SELECT FROM $1 WHERE BEAMNO != REFBEAMNO";
|
---|
1384 | if (scantype == "on") {
|
---|
1385 | taql = "SELECT FROM $1 WHERE BEAMNO == REFBEAMNO";
|
---|
1386 | }
|
---|
1387 | Table tab = tableCommand(taql, in->table());
|
---|
1388 | TableCopy::copyRows(tout, tab);
|
---|
1389 | if (scantype == "on") {
|
---|
1390 | // re-index SCANNO to 0
|
---|
1391 | TableVector<uInt> vec(tout, "SCANNO");
|
---|
1392 | vec = 0;
|
---|
1393 | }
|
---|
1394 | return out;
|
---|
1395 | }
|
---|
1396 |
|
---|
1397 | CountedPtr< Scantable >
|
---|
1398 | asap::STMath::lagFlag( const CountedPtr< Scantable > & in,
|
---|
1399 | double frequency, double width )
|
---|
1400 | {
|
---|
1401 | CountedPtr< Scantable > out = getScantable(in, false);
|
---|
1402 | Table& tout = out->table();
|
---|
1403 | TableIterator iter(tout, "FREQ_ID");
|
---|
1404 | FFTServer<Float,Complex> ffts;
|
---|
1405 | while ( !iter.pastEnd() ) {
|
---|
1406 | Table tab = iter.table();
|
---|
1407 | Double rp,rv,inc;
|
---|
1408 | ROTableRow row(tab);
|
---|
1409 | const TableRecord& rec = row.get(0);
|
---|
1410 | uInt freqid = rec.asuInt("FREQ_ID");
|
---|
1411 | out->frequencies().getEntry(rp, rv, inc, freqid);
|
---|
1412 | ArrayColumn<Float> specCol(tab, "SPECTRA");
|
---|
1413 | ArrayColumn<uChar> flagCol(tab, "FLAGTRA");
|
---|
1414 | for (int i=0; i<int(tab.nrow()); ++i) {
|
---|
1415 | Vector<Float> spec = specCol(i);
|
---|
1416 | Vector<uChar> flag = flagCol(i);
|
---|
1417 | Int lag0 = Int(spec.nelements()*abs(inc)/(frequency+width)+0.5);
|
---|
1418 | Int lag1 = Int(spec.nelements()*abs(inc)/(frequency-width)+0.5);
|
---|
1419 | for (int k=0; k < flag.nelements(); ++k ) {
|
---|
1420 | if (flag[k] > 0) {
|
---|
1421 | spec[k] = 0.0;
|
---|
1422 | }
|
---|
1423 | }
|
---|
1424 | Vector<Complex> lags;
|
---|
1425 | ffts.fft0(lags, spec);
|
---|
1426 | Int start = max(0, lag0);
|
---|
1427 | Int end = min(Int(lags.nelements()-1), lag1);
|
---|
1428 | if (start == end) {
|
---|
1429 | lags[start] = Complex(0.0);
|
---|
1430 | } else {
|
---|
1431 | for (int j=start; j <=end ;++j) {
|
---|
1432 | lags[j] = Complex(0.0);
|
---|
1433 | }
|
---|
1434 | }
|
---|
1435 | ffts.fft0(spec, lags);
|
---|
1436 | specCol.put(i, spec);
|
---|
1437 | }
|
---|
1438 | ++iter;
|
---|
1439 | }
|
---|
1440 | return out;
|
---|
1441 | }
|
---|