[137] | 1 | //#--------------------------------------------------------------------------- |
---|
| 2 | //# MathUtilities.cc: General math operations |
---|
| 3 | //#--------------------------------------------------------------------------- |
---|
| 4 | //# Copyright (C) 2004 |
---|
| 5 | //# ATNF |
---|
| 6 | //# |
---|
| 7 | //# This program is free software; you can redistribute it and/or modify it |
---|
| 8 | //# under the terms of the GNU General Public License as published by the Free |
---|
| 9 | //# Software Foundation; either version 2 of the License, or (at your option) |
---|
| 10 | //# any later version. |
---|
| 11 | //# |
---|
| 12 | //# This program is distributed in the hope that it will be useful, but |
---|
| 13 | //# WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 14 | //# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
---|
| 15 | //# Public License for more details. |
---|
| 16 | //# |
---|
| 17 | //# You should have received a copy of the GNU General Public License along |
---|
| 18 | //# with this program; if not, write to the Free Software Foundation, Inc., |
---|
| 19 | //# 675 Massachusetts Ave, Cambridge, MA 02139, USA. |
---|
| 20 | //# |
---|
| 21 | //# Correspondence concerning this software should be addressed as follows: |
---|
| 22 | //# Internet email: Malte.Marquarding@csiro.au |
---|
| 23 | //# Postal address: Malte Marquarding, |
---|
| 24 | //# Australia Telescope National Facility, |
---|
| 25 | //# P.O. Box 76, |
---|
| 26 | //# Epping, NSW, 2121, |
---|
| 27 | //# AUSTRALIA |
---|
| 28 | //# |
---|
| 29 | //# $Id: |
---|
| 30 | //#--------------------------------------------------------------------------- |
---|
| 31 | |
---|
| 32 | #include <casa/aips.h> |
---|
[452] | 33 | #include <casa/Arrays/Array.h> |
---|
| 34 | #include <casa/Arrays/ArrayIter.h> |
---|
[137] | 35 | #include <casa/Arrays/Vector.h> |
---|
| 36 | #include <casa/Arrays/VectorSTLIterator.h> |
---|
| 37 | |
---|
| 38 | #include "MathUtils.h" |
---|
| 39 | |
---|
| 40 | using namespace casa; |
---|
| 41 | |
---|
| 42 | template <class T> |
---|
[829] | 43 | void mathutil::hanning(Vector<T>& out, Vector<Bool>& outmask, |
---|
| 44 | const Vector<T>& in, const Vector<Bool>& mask, |
---|
[209] | 45 | Bool relaxed, Bool ignoreOther) { |
---|
[137] | 46 | |
---|
| 47 | Vector< Vector<T> > weights(8); |
---|
| 48 | Vector<Float> vals(3); |
---|
| 49 | vals = 0.0;weights[0] = vals;// FFF |
---|
| 50 | vals[0] = 1.0; vals[1] = 0.0; vals[2] = 0.0; weights[1] = vals;// TFF |
---|
| 51 | vals[0] = 0.0; vals[1] = 1.0; vals[2] = 0.0; weights[2] = vals;// FTF |
---|
| 52 | vals[0] = 1.0/3.0; vals[1] = 2.0/3.0; vals[2] = 0.0; weights[3] = vals;// TTF |
---|
| 53 | vals[0] = 0.0; vals[1] = 0.0; vals[2] = 1.0;weights[4] = vals;// FFT |
---|
| 54 | vals[0] = 0.5; vals[1] = 0.0; vals[2] = 0.5; weights[5] = vals;// TFT |
---|
| 55 | vals[0] = 0.0; vals[1] = 2.0/3.0; vals[2] = 1.0/3.0; weights[6] = vals;// FTT |
---|
[829] | 56 | vals[0] = 0.25; vals[1] = 0.5; vals[2] = 0.25; weights[7] = vals;// TTT |
---|
[137] | 57 | // Chris' case |
---|
[829] | 58 | Vector<Bool> weighted(8); |
---|
[137] | 59 | if (relaxed) { |
---|
| 60 | weighted = False; |
---|
| 61 | weighted[7] = True; |
---|
| 62 | |
---|
| 63 | } else { |
---|
| 64 | weighted = True; |
---|
| 65 | weighted[0] = False; |
---|
| 66 | } |
---|
[829] | 67 | |
---|
[137] | 68 | out.resize(in.nelements()); |
---|
| 69 | outmask.resize(mask.nelements()); |
---|
| 70 | |
---|
| 71 | // make special case for first and last |
---|
| 72 | /// ...here |
---|
| 73 | // loop from 1..n-2 |
---|
| 74 | uInt i = 1; |
---|
| 75 | VectorSTLIterator<T> outit(out); |
---|
| 76 | outit++; |
---|
| 77 | VectorSTLIterator<Bool> outmit(outmask);outmit++; |
---|
| 78 | uInt m;Vector<T>* w; |
---|
| 79 | for (VectorSTLIterator<T> it = outit;it != out.end()-1;++it) { |
---|
| 80 | |
---|
| 81 | m = mask[i-1] + 2*mask[i] + 4*mask[i+1]; |
---|
| 82 | w = &(weights[m]); |
---|
| 83 | if (weighted[m]) { |
---|
| 84 | (*it) = (*w)[0]*in[i-1] + (*w)[1]*in[i] + (*w)[2]*in[i+1]; |
---|
| 85 | (*outmit) = True; |
---|
| 86 | } else { // mask it |
---|
| 87 | (*outmit) = False; |
---|
| 88 | } |
---|
| 89 | ++i; |
---|
| 90 | ++outmit; |
---|
| 91 | } |
---|
| 92 | } |
---|