source: trunk/src/SDMath.h @ 502

Last change on this file since 502 was 502, checked in by kil064, 19 years ago

add function rotateLinPolPhase
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1//#---------------------------------------------------------------------------
2//# SDMath.h: A collection of single dish mathematical 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#ifndef SDMATH_H
32#define SDMATH_H
33
34#include <string>
35#include <vector>
36#include <casa/aips.h>
37#include <casa/Utilities/CountedPtr.h>
38#include <coordinates/Coordinates/FrequencyAligner.h>
39
40#include "SDDefs.h"
41
42class casa::Table;
43class casa::MEpoch;
44class casa::MPosition;
45template<class T> class casa::PtrBlock;
46template<class T> class casa::Matrix;
47template<class T> class casa::ROScalarColumn;
48template<class T> class casa::ROArrayColumn;
49
50
51
52namespace asap {
53
54class SDMemTable;
55class SDDataDesc;
56
57class SDMath {
58
59 public:
60
61// Default constructor
62   SDMath();
63
64// Copy Constructor (copy semantics)
65   SDMath (const SDMath& other);
66
67// Assignment  (copy semantics)
68   SDMath &operator=(const SDMath& other);
69
70// Destructor
71   ~SDMath();
72
73// Binary Table operators. op=ADD, SUB, MUL, DIV, QUOTIENT
74   casa::CountedPtr<SDMemTable> binaryOperate (const casa::CountedPtr<SDMemTable>& left,
75                                               const casa::CountedPtr<SDMemTable>& right,
76                                               const casa::String& op, casa::Bool preserve,
77                                               casa::Bool tSys) const;
78
79// Average in time
80   casa::CountedPtr<SDMemTable>  average(const casa::Block<casa::CountedPtr<SDMemTable> >& in,
81                                         const casa::Vector<casa::Bool>& mask,
82                                         casa::Bool scanAverage,
83                                         const casa::String& weightStr,
84                                         casa::Bool align=casa::False) const;
85
86// Statistics. If row<0, all rows are done otherwise, just the
87// specified row.
88   std::vector<float> statistic(const casa::CountedPtr<SDMemTable>& in,
89                                const casa::Vector<casa::Bool>& mask,
90                                const casa::String& which, casa::Int row) const;
91
92// Bin up spectra
93   SDMemTable* bin(const SDMemTable& in, casa::Int width) const;
94
95// Resample spectra
96   SDMemTable* resample(const SDMemTable& in, const casa::String& method,
97                        casa::Float factor) const;
98
99// Smooth
100   SDMemTable* smooth (const SDMemTable& in, const casa::String& kernel,
101                       casa::Float width, casa::Bool doAll) const;
102
103// Flux conversion between Jansky and Kelvin
104   SDMemTable* convertFlux (const SDMemTable& in, casa::Float D, casa::Float etaAp,
105                            casa::Float JyPerK, casa::Bool doAll) const;
106
107// Gain-elevation correction
108   SDMemTable* gainElevation (const SDMemTable& in, const casa::Vector<casa::Float>& coeffs,
109                              const casa::String& fileName,
110                              const casa::String& method, casa::Bool doAll) const;
111
112// Frequency Alignment
113   SDMemTable* frequencyAlignment (const SDMemTable& in, const casa::String& refTime,
114                                   const casa::String& method, casa::Bool perFreqID) const;
115
116// Opacity correction
117   SDMemTable* opacity (const SDMemTable& in, casa::Float tau, casa::Bool doAll) const;
118
119// Simple unary mathematical operations.  what=0 (mul) or 1 (add)
120   SDMemTable* unaryOperate(const SDMemTable& in, casa::Float offset,
121                            casa::Bool doAll, casa::uInt what, casa::Bool tSys) const;
122
123// Average polarizations
124   SDMemTable* averagePol(const SDMemTable& in, const casa::Vector<casa::Bool>& mask,
125                          const casa::String& wtStr) const;
126
127// Rotate XY phase. Value in degrees.
128   void rotateXYPhase (SDMemTable& in, casa::Float value, casa::Bool doAll);
129
130// Rotate Q & U by operating on the raw correlations.Value in degrees.
131   void rotateLinPolPhase (SDMemTable& in, casa::Float value, casa::Bool doAll);
132
133
134 private:
135
136// Weighting type for time averaging
137
138  enum WeightType {NONE,VAR,TSYS};
139
140// Function to use accumulate data during time averaging
141
142  void accumulate (casa::Double& timeSum, casa::Double& intSum, casa::Int& nAccum,
143                   casa::MaskedArray<casa::Float>& sum, casa::Array<casa::Float>& sumSq,
144                   casa::Array<casa::Float>& nPts, casa::Array<casa::Float>& tSysSum,
145                   const casa::Array<casa::Float>& tSys,  const casa::Array<casa::Float>& nInc,
146                   const casa::Vector<casa::Bool>& mask, casa::Double time, casa::Double interval,
147                   const casa::Block<casa::CountedPtr<SDMemTable> >& in,
148                   casa::uInt iTab, casa::uInt iRow, casa::uInt axis, casa::uInt nAxesSub,
149                   casa::Bool useMask, WeightType wtType) const;
150
151// Work out conversion factor for converting Jy<->K per IF per row and apply
152   void convertBrightnessUnits (SDMemTable* pTabOut, const SDMemTable& in,
153                                casa::Bool toKelvin, casa::Float sFac, casa::Bool doAll) const;
154
155// Convert weight string to enum value
156
157   void convertWeightString (WeightType& wt, const casa::String& weightStr) const;
158
159// Convert interpolation type string
160//   void convertInterpString(casa::Int& type, const casa::String& interp) const;
161   void convertInterpString(casa::InterpolateArray1D<casa::Double,casa::Float>::InterpolationMethod& method, 
162                             const casa::String& interp) const;
163
164// Scale data with values from an ascii Table
165   void scaleFromAsciiTable(SDMemTable* pTabOut, const SDMemTable& in,
166                              const casa::String& fileName,
167                              const casa::String& col0, const casa::String& col1,
168                              const casa::String& methodStr, casa::Bool doAll,
169                              const casa::Vector<casa::Float>& xOut, casa::Bool doTSys) const;
170
171// Scale data with values from a Table
172   void scaleFromTable(SDMemTable* pTabOut, const SDMemTable& in, const casa::Table& tTable,
173                         const casa::String& col0, const casa::String& col1,
174                         const casa::String& methodStr, casa::Bool doAll,
175                         const casa::Vector<casa::Float>& xOut, casa::Bool doTSys) const;
176
177// Scale data and optionally TSys by values in a Vector
178   void scaleByVector (SDMemTable* pTabOut, const SDMemTable& in,
179                       casa::Bool doAll, const casa::Vector<casa::Float>& factor,
180                       casa::Bool doTSys) const;
181
182// Convert time String to Epoch
183   casa::MEpoch epochFromString (const casa::String& str, casa::MEpoch::Types timeRef) const;
184
185// Function to fill Scan Container when averaging in time
186
187  void fillSDC (SDContainer& sc, const casa::Array<casa::Bool>& mask,
188                const casa::Array<casa::Float>& data,
189                const casa::Array<casa::Float>& tSys,
190                casa::Int scanID, casa::Double timeStamp,
191                casa::Double interval, const casa::String& sourceName,
192                const casa::Vector<casa::uInt>& freqID) const;
193
194// Format EPoch
195   casa::String formatEpoch(const casa::MEpoch& epoch)  const;
196
197// Align in Frequency
198   SDMemTable* frequencyAlign (const SDMemTable& in,
199                              casa::MFrequency::Types system,
200                              const casa::String& timeRef,
201                              const casa::String& method, casa::Bool perIF) const;
202
203// Generate frequency aligners
204   void generateFrequencyAligners (casa::PtrBlock<casa::FrequencyAligner<casa::Float>* >& a,
205                                   const SDDataDesc& dDesc,
206                                   const SDMemTable& in, casa::uInt nChan,
207                                   casa::MFrequency::Types system,
208                                   const casa::MPosition& refPos,
209                                   const casa::MEpoch& refEpoch, casa::Bool perFreqID) const;
210
211// Generate data description table (combines source and freqID)
212   void generateDataDescTable (casa::Matrix<casa::uInt>& ddIdx,
213                               SDDataDesc& dDesc,
214                               casa::uInt nIF,
215                               const SDMemTable& in,
216                               const casa::Table& tabIn,
217                               const casa::ROScalarColumn<casa::String>& srcCol,
218                               const casa::ROArrayColumn<casa::uInt>& fqIDCol,
219                               casa::Bool perFreqID) const;
220
221// Get row range from SDMemTable state
222   casa::Vector<casa::uInt> getRowRange (const SDMemTable& in) const;
223
224// Is row in the row range ?
225   casa::Bool rowInRange (casa::uInt i, const casa::Vector<casa::uInt>& range) const;
226
227// Set slice to cursor or all axes
228    void setCursorSlice (casa::IPosition& start, casa::IPosition& end,
229                         casa::Bool doAll, const SDMemTable& in) const;
230
231// Function to normalize data when averaging in time
232
233  void normalize (casa::MaskedArray<casa::Float>& data,
234                  const casa::Array<casa::Float>& sumSq,
235                  const casa::Array<casa::Float>& nPts,
236                  WeightType wtType, casa::Int axis, casa::Int nAxes) const;
237
238// Put the data and mask into the SDContainer
239   void putDataInSDC (SDContainer& sc, const casa::Array<casa::Float>& data,
240                      const casa::Array<casa::Bool>& mask) const;
241
242// Read ascii file into a Table
243
244   casa::Table readAsciiFile (const casa::String& fileName) const;
245};
246
247
248
249
250} // namespace
251
252#endif
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