[37] | 1 | //#--------------------------------------------------------------------------- |
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| 2 | //# MathUtilities.cc: General math operations |
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| 3 | //#--------------------------------------------------------------------------- |
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| 4 | //# Copyright (C) 2004 |
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[125] | 5 | //# ATNF |
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[37] | 6 | //# |
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| 7 | //# This program is free software; you can redistribute it and/or modify it |
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| 8 | //# under the terms of the GNU General Public License as published by the Free |
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| 9 | //# Software Foundation; either version 2 of the License, or (at your option) |
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| 10 | //# any later version. |
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| 11 | //# |
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| 12 | //# This program is distributed in the hope that it will be useful, but |
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| 13 | //# WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | //# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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| 15 | //# Public License for more details. |
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| 16 | //# |
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| 17 | //# You should have received a copy of the GNU General Public License along |
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| 18 | //# with this program; if not, write to the Free Software Foundation, Inc., |
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| 19 | //# 675 Massachusetts Ave, Cambridge, MA 02139, USA. |
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| 20 | //# |
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| 21 | //# Correspondence concerning this software should be addressed as follows: |
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| 22 | //# Internet email: Malte.Marquarding@csiro.au |
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| 23 | //# Postal address: Malte Marquarding, |
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| 24 | //# Australia Telescope National Facility, |
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| 25 | //# P.O. Box 76, |
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| 26 | //# Epping, NSW, 2121, |
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| 27 | //# AUSTRALIA |
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| 28 | //# |
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| 29 | //# $Id: |
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| 30 | //#--------------------------------------------------------------------------- |
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| 31 | |
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[125] | 32 | #include <casa/aips.h> |
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[176] | 33 | #include <casa/Arrays/Vector.h> |
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[137] | 34 | #include <casa/Arrays/MaskedArray.h> |
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[136] | 35 | #include <casa/Arrays/MaskArrMath.h> |
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[465] | 36 | #include <casa/Arrays/VectorSTLIterator.h> |
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[136] | 37 | #include <casa/BasicSL/String.h> |
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[37] | 38 | |
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[125] | 39 | #include "MathUtils.h" |
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| 40 | |
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| 41 | using namespace casa; |
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| 42 | |
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[829] | 43 | float mathutil::statistics(const String& which, |
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[996] | 44 | const MaskedArray<Float>& data) |
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[136] | 45 | { |
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| 46 | String str(which); |
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| 47 | str.upcase(); |
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| 48 | if (str.contains(String("MIN"))) { |
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[829] | 49 | return min(data); |
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[136] | 50 | } else if (str.contains(String("MAX"))) { |
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| 51 | return max(data); |
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| 52 | } else if (str.contains(String("SUMSQ"))) { |
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| 53 | return sumsquares(data); |
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| 54 | } else if (str.contains(String("SUM"))) { |
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| 55 | return sum(data); |
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| 56 | } else if (str.contains(String("MEAN"))) { |
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| 57 | return mean(data); |
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| 58 | } else if (str.contains(String("VAR"))) { |
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[829] | 59 | return variance(data); |
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[136] | 60 | } else if (str.contains(String("STDDEV"))) { |
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| 61 | return stddev(data); |
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| 62 | } else if (str.contains(String("AVDEV"))) { |
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| 63 | return avdev(data); |
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| 64 | } else if (str.contains(String("RMS"))) { |
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| 65 | uInt n = data.nelementsValid(); |
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| 66 | return sqrt(sumsquares(data)/n); |
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| 67 | } else if (str.contains(String("MED"))) { |
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| 68 | return median(data); |
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| 69 | } |
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[996] | 70 | return 0.0; |
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[136] | 71 | } |
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[176] | 72 | |
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[829] | 73 | |
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[209] | 74 | void mathutil::replaceMaskByZero(Vector<Float>& data, const Vector<Bool>& mask) |
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[176] | 75 | { |
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| 76 | for (uInt i=0; i<data.nelements(); i++) { |
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| 77 | if (!mask[i]) data[i] = 0.0; |
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| 78 | } |
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| 79 | } |
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[382] | 80 | |
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| 81 | |
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[829] | 82 | std::vector<std::string> mathutil::tovectorstring(const Vector<String>& in) |
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[382] | 83 | { |
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[465] | 84 | std::vector<std::string> out; |
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| 85 | VectorSTLIterator<String> it(in); |
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| 86 | for (uInt i=0; it != in.end(); ++it,++i) { |
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| 87 | out.push_back(*it); |
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| 88 | } |
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| 89 | return out; |
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| 90 | } |
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| 91 | |
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[829] | 92 | Vector<String> mathutil::toVectorString(const std::vector<std::string>& in) |
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[465] | 93 | { |
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| 94 | Vector<String> out(in.size()); |
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| 95 | uInt i=0; |
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| 96 | std::vector<std::string>::const_iterator it; |
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| 97 | for (it=in.begin();it != in.end();++it,++i) { |
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| 98 | out[i] = casa::String(*it); |
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| 99 | } |
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| 100 | return out; |
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| 101 | } |
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[1325] | 102 | |
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| 103 | void mathutil::hanning(Vector<Float>& out, Vector<Bool>& outmask, |
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| 104 | const Vector<Float>& in, const Vector<Bool>& mask, |
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| 105 | Bool relaxed, Bool ignoreOther) { |
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| 106 | Vector< Vector<Float> > weights(8); |
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| 107 | Vector<Float> vals(3); |
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| 108 | vals = 0.0;weights[0] = vals;// FFF |
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| 109 | vals[0] = 1.0; vals[1] = 0.0; vals[2] = 0.0; weights[1] = vals;// TFF |
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| 110 | vals[0] = 0.0; vals[1] = 1.0; vals[2] = 0.0; weights[2] = vals;// FTF |
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| 111 | vals[0] = 1.0/3.0; vals[1] = 2.0/3.0; vals[2] = 0.0; weights[3] = vals;// TTF |
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| 112 | vals[0] = 0.0; vals[1] = 0.0; vals[2] = 1.0;weights[4] = vals;// FFT |
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| 113 | vals[0] = 0.5; vals[1] = 0.0; vals[2] = 0.5; weights[5] = vals;// TFT |
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| 114 | vals[0] = 0.0; vals[1] = 2.0/3.0; vals[2] = 1.0/3.0; weights[6] = vals;// FTT |
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| 115 | vals[0] = 0.25; vals[1] = 0.5; vals[2] = 0.25; weights[7] = vals;// TTT |
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| 116 | // Chris' case |
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| 117 | Vector<Bool> weighted(8); |
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| 118 | if (relaxed) { |
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| 119 | weighted = False; |
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| 120 | weighted[7] = True; |
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| 121 | |
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| 122 | } else { |
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| 123 | weighted = True; |
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| 124 | weighted[0] = False; |
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| 125 | } |
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| 126 | |
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| 127 | out.resize(in.nelements()); |
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| 128 | outmask.resize(mask.nelements()); |
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| 129 | // make special case for first and last |
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| 130 | /// ...here |
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| 131 | // loop from 1..n-2 |
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| 132 | out.resize(in.nelements()); |
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| 133 | out[0] = in[0];out[out.nelements()-1] = in[in.nelements()-1]; |
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| 134 | outmask.resize(mask.nelements()); |
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| 135 | outmask = False; |
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| 136 | uInt m;Vector<Float>* w; |
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| 137 | for (uInt i=1; i < out.nelements()-1;++i) { |
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| 138 | m = mask[i-1] + 2*mask[i] + 4*mask[i+1]; |
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| 139 | w = &(weights[m]); |
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| 140 | if (weighted[m]) { |
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| 141 | out[i] = (*w)[0]*in[i-1] + (*w)[1]*in[i] + (*w)[2]*in[i+1]; |
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| 142 | outmask[i] = True; |
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| 143 | } else { // mask it |
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| 144 | out[i] = in[i];//use arbitrary value |
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| 145 | outmask[i] = False; |
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| 146 | } |
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| 147 | } |
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| 148 | } |
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