source: trunk/src/MathUtils2.cc@ 318

Last change on this file since 318 was 209, checked in by mar637, 20 years ago
  • now using asap::AxisNo enum instead of fixed axis indeces
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 3.1 KB
Line 
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>
33#include <casa/Arrays/Vector.h>
34#include <casa/Arrays/VectorSTLIterator.h>
35
36#include "MathUtils.h"
37
38using namespace casa;
39
40template <class T>
41void mathutil::hanning(Vector<T>& out, Vector<Bool>& outmask,
42 const Vector<T>& in, const Vector<Bool>& mask,
43 Bool relaxed, Bool ignoreOther) {
44
45 Vector< Vector<T> > weights(8);
46 Vector<Float> vals(3);
47 vals = 0.0;weights[0] = vals;// FFF
48 vals[0] = 1.0; vals[1] = 0.0; vals[2] = 0.0; weights[1] = vals;// TFF
49 vals[0] = 0.0; vals[1] = 1.0; vals[2] = 0.0; weights[2] = vals;// FTF
50 vals[0] = 1.0/3.0; vals[1] = 2.0/3.0; vals[2] = 0.0; weights[3] = vals;// TTF
51 vals[0] = 0.0; vals[1] = 0.0; vals[2] = 1.0;weights[4] = vals;// FFT
52 vals[0] = 0.5; vals[1] = 0.0; vals[2] = 0.5; weights[5] = vals;// TFT
53 vals[0] = 0.0; vals[1] = 2.0/3.0; vals[2] = 1.0/3.0; weights[6] = vals;// FTT
54 vals[0] = 0.25; vals[1] = 0.5; vals[2] = 0.25; weights[7] = vals;// TTT
55 // Chris' case
56 Vector<Bool> weighted(8);
57 if (relaxed) {
58 weighted = False;
59 weighted[7] = True;
60
61 } else {
62 weighted = True;
63 weighted[0] = False;
64 }
65
66 out.resize(in.nelements());
67 outmask.resize(mask.nelements());
68
69 // make special case for first and last
70 /// ...here
71 // loop from 1..n-2
72 uInt i = 1;
73 VectorSTLIterator<T> outit(out);
74 outit++;
75 VectorSTLIterator<Bool> outmit(outmask);outmit++;
76 uInt m;Vector<T>* w;
77 for (VectorSTLIterator<T> it = outit;it != out.end()-1;++it) {
78
79 m = mask[i-1] + 2*mask[i] + 4*mask[i+1];
80 w = &(weights[m]);
81 if (weighted[m]) {
82 (*it) = (*w)[0]*in[i-1] + (*w)[1]*in[i] + (*w)[2]*in[i+1];
83 (*outmit) = True;
84 } else { // mask it
85 (*outmit) = False;
86 }
87 ++i;
88 ++outmit;
89 }
90}
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