| [37] | 1 | //#---------------------------------------------------------------------------
|
|---|
| 2 | //# MathUtilities.cc: General math operations
|
|---|
| 3 | //#---------------------------------------------------------------------------
|
|---|
| 4 | //# Copyright (C) 2004
|
|---|
| 5 | //# Malte Marquarding, 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 <aips/Arrays/Vector.h>
|
|---|
| 33 | #include <aips/Arrays/VectorSTLIterator.h>
|
|---|
| 34 |
|
|---|
| 35 | template <class T>
|
|---|
| 36 | void hanning(Vector<T>& out, Vector<Bool>& outmask,
|
|---|
| 37 | const Vector<T>& in, const Vector<Bool>& mask,
|
|---|
| 38 | Bool relaxed, Bool ignoreOther) {
|
|---|
| 39 |
|
|---|
| 40 | Vector< Vector<T> > weights(8);
|
|---|
| 41 | Vector<Float> vals(3);
|
|---|
| 42 | vals = 0.0;weights[0] = vals;// FFF
|
|---|
| 43 | vals[0] = 1.0; vals[1] = 0.0; vals[2] = 0.0; weights[1] = vals;// TFF
|
|---|
| 44 | vals[0] = 0.0; vals[1] = 1.0; vals[2] = 0.0; weights[2] = vals;// FTF
|
|---|
| 45 | vals[0] = 1.0/3.0; vals[1] = 2.0/3.0; vals[2] = 0.0; weights[3] = vals;// TTF
|
|---|
| 46 | vals[0] = 0.0; vals[1] = 0.0; vals[2] = 1.0;weights[4] = vals;// FFT
|
|---|
| 47 | vals[0] = 0.5; vals[1] = 0.0; vals[2] = 0.5; weights[5] = vals;// TFT
|
|---|
| 48 | vals[0] = 0.0; vals[1] = 2.0/3.0; vals[2] = 1.0/3.0; weights[6] = vals;// FTT
|
|---|
| 49 | vals[0] = 0.25; vals[1] = 0.5; vals[2] = 0.25; weights[7] = vals;// TTT
|
|---|
| 50 | // Chris' case
|
|---|
| 51 | Vector<Bool> weighted(8);
|
|---|
| 52 | if (relaxed) {
|
|---|
| 53 | weighted = False;
|
|---|
| 54 | weighted[7] = True;
|
|---|
| 55 |
|
|---|
| 56 | } else {
|
|---|
| 57 | weighted = True;
|
|---|
| 58 | weighted[0] = False;
|
|---|
| 59 | }
|
|---|
| 60 |
|
|---|
| 61 | out.resize(in.nelements());
|
|---|
| 62 | outmask.resize(mask.nelements());
|
|---|
| 63 |
|
|---|
| 64 | // make special case for first and last
|
|---|
| 65 | /// ...here
|
|---|
| 66 | // loop from 1..n-2
|
|---|
| 67 | uInt i = 1;
|
|---|
| 68 | VectorSTLIterator<T> outit(out);
|
|---|
| 69 | outit++;
|
|---|
| 70 | VectorSTLIterator<Bool> outmit(outmask);outmit++;
|
|---|
| 71 | uInt m;Vector<T>* w;
|
|---|
| 72 | for (VectorSTLIterator<T> it = outit;it != out.end()-1;++it) {
|
|---|
| 73 |
|
|---|
| 74 | m = mask[i-1] + 2*mask[i] + 4*mask[i+1];
|
|---|
| 75 | w = &(weights[m]);
|
|---|
| 76 | if (weighted[m]) {
|
|---|
| 77 | (*it) = (*w)[0]*in[i-1] + (*w)[1]*in[i] + (*w)[2]*in[i+1];
|
|---|
| 78 | (*outmit) = True;
|
|---|
| 79 | } else { // mask it
|
|---|
| 80 | (*outmit) = False;
|
|---|
| 81 | }
|
|---|
| 82 | ++i;
|
|---|
| 83 | ++outmit;
|
|---|
| 84 | }
|
|---|
| 85 | }
|
|---|
