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