source: branches/atnf/src/SDMath.cc@ 597

Last change on this file since 597 was 2, checked in by mmarquar, 20 years ago

Initial revision

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1//#---------------------------------------------------------------------------
2//# SDMath.cc: A collection of single dish mathematical 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#include <aips/aips.h>
32#include <aips/Utilities/String.h>
33#include <aips/Arrays/IPosition.h>
34#include <aips/Arrays/Array.h>
35#include <aips/Arrays/ArrayMath.h>
36#include <aips/Arrays/ArrayLogical.h>
37#include <aips/Arrays/MaskedArray.h>
38#include <aips/Arrays/MaskArrMath.h>
39#include <aips/Arrays/MaskArrLogi.h>
40
41#include <aips/Tables/Table.h>
42#include <aips/Tables/ScalarColumn.h>
43#include <aips/Tables/ArrayColumn.h>
44
45#include "SDContainer.h"
46#include "SDMemTable.h"
47
48#include "SDMath.h"
49
50using namespace atnf_sd;
51
52static CountedPtr<SDMemTable> SDMath::average(const CountedPtr<SDMemTable>& in) {
53 Table t = in->table();
54 ROArrayColumn<Float> tsys(t, "TSYS");
55 ROScalarColumn<Double> mjd(t, "TIME");
56 ROScalarColumn<String> srcn(t, "SRCNAME");
57 IPosition ip = in->rowAsMaskedArray(0).shape();
58 Array<Float> outarr(ip); outarr =0.0;
59 Array<Float> narr(ip);narr = 0.0;
60 Array<Float> narrinc(ip);narrinc = 1.0;
61
62 Array<Float> tsarr(tsys.shape(0));
63 Array<Float> outtsarr(tsys.shape(0));
64 Double tme = 0.0;
65
66 for (uInt i=0; i < t.nrow(); i++) {
67 // data stuff
68 MaskedArray<Float> marr(in->rowAsMaskedArray(i));
69 outarr += marr;
70 MaskedArray<Float> n(narrinc,marr.getMask());
71 narr += n;
72 // get
73 tsys.get(i, tsarr);// this is probably unneccessary as tsys should
74 outtsarr += tsarr; // be constant
75 Double tmp;
76 mjd.get(i,tmp);
77 tme += tmp;// average time
78 }
79 // averaging using mask
80 MaskedArray<Float> nma (narr,(narr > Float(0)));
81 outarr /= nma;
82
83 SDContainer sc(ip(0),ip(1),ip(2),ip(3));
84
85 Int n = t.nrow();
86 outtsarr /= Float(n/2);
87 sc.timestamp = tme/Double(n/2);
88
89 String tstr; srcn.getScalar(n,tstr);// get sourcename of "mid" point
90 sc.sourcename = tstr;
91 sc.putSpectrum(outarr);
92 //sc.putFlags(outflags);
93 SDMemTable* sdmt = new SDMemTable(*in);
94 sdmt->putSDContainer(sc);
95 return CountedPtr<SDMemTable>(sdmt);
96}
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