source: branches/asap-3.x/src/STMath.h@ 2797

Last change on this file since 2797 was 1689, checked in by Malte Marquarding, 15 years ago

Ticket #177: added skydip function to determine opacities. This resulted in a slight interface change to accept lists of opacities in the scantable.opacity function
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 11.4 KB
Line 
1//
2// C++ Interface: STMath
3//
4// Description:
5//
6//
7// Author: Malte Marquarding <asap@atnf.csiro.au>, (C) 2006
8//
9// Copyright: See COPYING file that comes with this distribution
10//
11//
12#ifndef ASAPSTMATH_H
13#define ASAPSTMATH_H
14
15#include <string>
16#include <map>
17
18#include <casa/aips.h>
19#include <casa/Utilities/CountedPtr.h>
20#include <casa/BasicSL/String.h>
21#include <casa/Arrays/Vector.h>
22#include <scimath/Mathematics/InterpolateArray1D.h>
23
24#include "Scantable.h"
25#include "STDefs.h"
26#include "STPol.h"
27#include "Logger.h"
28
29namespace asap {
30
31/**
32 * Mathmatical operations on Scantable objects
33 * @author Malte Marquarding
34*/
35class STMath : private Logger {
36public:
37 // typedef for long method name
38 typedef casa::InterpolateArray1D<casa::Double,
39 casa::Float>::InterpolationMethod imethod;
40
41 // typedef for std::map
42 typedef std::map<std::string, imethod> imap;
43
44/**
45 * whether to operate on the given Scantable or return a new one
46 * @param insitu the toggle for this behaviour
47 */
48 explicit STMath(bool insitu=true);
49
50 virtual ~STMath();
51
52 /**
53 * get the currnt @attr inistu_ state
54 */
55 bool insitu() const { return insitu_;};
56
57 /**
58 * set the currnt @attr inistu state
59 * @param b the new state
60 */
61 void setInsitu(bool b) { insitu_ = b; };
62
63
64 /**
65 * average a vector of Scantables
66 * @param in the vector of Scantables to average
67 * @param mask an optional mask to apply on specific weights
68 * @param weight weighting scheme
69 * @param avmode the mode ov averaging. Per "SCAN" or "ALL".
70 * @return a casa::CountedPtr<Scantable> which either holds a new Scantable
71 * or returns the imput pointer.
72 */
73 casa::CountedPtr<Scantable>
74 average( const std::vector<casa::CountedPtr<Scantable> >& in,
75 const std::vector<bool>& mask = std::vector<bool>(),
76 const std::string& weight = "NONE",
77 const std::string& avmode = "SCAN");
78
79 /**
80 * median average a vector of Scantables. See also STMath::average
81 * @param in the Scantable to average
82 * @param mode the averaging mode. Currently only "MEDIAN"
83 * @param avmode the mode ov averaging. Per "SCAN" or "ALL".
84 * @return a casa::CountedPtr<Scantable> which either holds a new Scantable
85 * or returns the imput pointer.
86 */
87 casa::CountedPtr<Scantable>
88 averageChannel( const casa::CountedPtr<Scantable> & in,
89 const std::string& mode = "MEDIAN",
90 const std::string& avmode = "SCAN");
91
92 /**
93 * Average polarisations together. really only useful if only linears are
94 * available.
95 * @param in the input Scantable
96 * @param mask an optional mask if weight allows one
97 * @param weight weighting scheme
98 * @return
99 */
100 casa::CountedPtr< Scantable >
101 averagePolarisations( const casa::CountedPtr< Scantable > & in,
102 const std::vector<bool>& mask,
103 const std::string& weight );
104
105 /**
106 * Average beams together.
107 * @param in the input Scantable
108 * @param mask an optional mask if weight allows one
109 * @param weight weighting scheme
110 * @return
111 */
112 casa::CountedPtr< Scantable >
113 averageBeams( const casa::CountedPtr< Scantable > & in,
114 const std::vector<bool>& mask,
115 const std::string& weight );
116
117 casa::CountedPtr<Scantable>
118 unaryOperate( const casa::CountedPtr<Scantable>& in, float val,
119 const std::string& mode, bool tsys=false );
120
121 casa::CountedPtr<Scantable>
122 binaryOperate( const casa::CountedPtr<Scantable>& left,
123 const casa::CountedPtr<Scantable>& right,
124 const std::string& mode);
125
126 casa::CountedPtr<Scantable> autoQuotient(const casa::CountedPtr<Scantable>& in,
127 const std::string& mode = "NEAREST",
128 bool preserve = true);
129
130 casa::CountedPtr<Scantable> quotient( const casa::CountedPtr<Scantable>& on,
131 const casa::CountedPtr<Scantable>& off,
132 bool preserve = true );
133
134 /**
135 * Calibrate total power scans (translated from GBTIDL)
136 * @param calon uncalibrated Scantable with CAL noise signal
137 * @param caloff uncalibrated Scantable with no CAL signal
138 * @param tcal optional scalar Tcal, CAL temperature (K)
139 * @return casa::CountedPtr<Scantable> which holds a calibrated Scantable
140 * (spectrum - average of the two CAL on and off spectra;
141 * tsys - mean Tsys = <caloff>*Tcal/<calon-caloff> + Tcal/2)
142 */
143 casa::CountedPtr<Scantable> dototalpower( const casa::CountedPtr<Scantable>& calon,
144 const casa::CountedPtr<Scantable>& caloff,
145 casa::Float tcal=1.0 );
146
147 /**
148 * Combine signal and reference scans (translated from GBTIDL)
149 * @param sig Scantable which contains signal scans
150 * @param ref Scantable which contains reference scans
151 * @param smoothref optional Boxcar smooth width of the reference scans
152 * default: no smoothing (=1)
153 * @param tsysv optional scalar Tsys value at the zenith, required to
154 * set tau, as well
155 * @param tau optional scalar Tau value
156 * @return casa::CountedPtr<Scantable> which holds combined scans
157 * (spectrum = (sig-ref)/ref * Tsys )
158 */
159 casa::CountedPtr<Scantable> dosigref( const casa::CountedPtr<Scantable>& sig,
160 const casa::CountedPtr<Scantable>& ref,
161 int smoothref=1,
162 casa::Float tsysv=0.0,
163 casa::Float tau=0.0 );
164
165 /**
166 * Calibrate GBT Nod scan pairs (translated from GBTIDL)
167 * @param s Scantable which contains Nod scans
168 * @param scans Vector of scan numbers
169 * @param smoothref optional Boxcar smooth width of the reference scans
170 * @param tsysv optional scalar Tsys value at the zenith, required to
171 * set tau, as well
172 * @param tau optional scalar Tau value
173 * @param tcal optional scalar Tcal, CAL temperature (K)
174 * @return casa::CountedPtr<Scantable> which holds calibrated scans
175 */
176 casa::CountedPtr<Scantable> donod( const casa::CountedPtr<Scantable>& s,
177 const std::vector<int>& scans,
178 int smoothref=1,
179 casa::Float tsysv=0.0,
180 casa::Float tau=0.0,
181 casa::Float tcal=0.0 );
182
183 /**
184 * Calibrate frequency switched scans (translated from GBTIDL)
185 * @param s Scantable which contains frequency switched scans
186 * @param scans Vector of scan numbers
187 * @param smoothref optional Boxcar smooth width of the reference scans
188 * @param tsysv optional scalar Tsys value at the zenith, required to
189 * set tau, as well
190 * @param tau optional scalar Tau value
191 * @param tcal optional scalar Tcal, CAL temperature (K)
192 * @return casa::CountedPtr<Scantable> which holds calibrated scans
193 */
194 casa::CountedPtr<Scantable> dofs( const casa::CountedPtr<Scantable>& s,
195 const std::vector<int>& scans,
196 int smoothref=1,
197 casa::Float tsysv=0.0,
198 casa::Float tau=0.0,
199 casa::Float tcal=0.0 );
200
201
202 casa::CountedPtr<Scantable>
203 freqSwitch( const casa::CountedPtr<Scantable>& in );
204
205 std::vector<float> statistic(const casa::CountedPtr<Scantable>& in,
206 const std::vector<bool>& mask,
207 const std::string& which);
208
209 casa::CountedPtr<Scantable> bin( const casa::CountedPtr<Scantable>& in,
210 int width=5);
211 casa::CountedPtr<Scantable>
212 resample(const casa::CountedPtr<Scantable>& in,
213 const std::string& method, float width);
214
215 casa::CountedPtr<Scantable>
216 smooth(const casa::CountedPtr<Scantable>& in, const std::string& kernel,
217 float width, int order=2);
218
219 casa::CountedPtr<Scantable>
220 gainElevation(const casa::CountedPtr<Scantable>& in,
221 const std::vector<float>& coeff,
222 const std::string& fileName,
223 const std::string& method);
224 casa::CountedPtr<Scantable>
225 convertFlux(const casa::CountedPtr<Scantable>& in, float d,
226 float etaap, float jyperk);
227
228 casa::CountedPtr<Scantable> opacity(const casa::CountedPtr<Scantable>& in,
229 const std::vector<float>& tau);
230
231 casa::CountedPtr<Scantable>
232 merge(const std::vector<casa::CountedPtr<Scantable> >& in);
233
234 casa::CountedPtr<Scantable>
235 invertPhase( const casa::CountedPtr<Scantable>& in);
236
237 casa::CountedPtr<Scantable>
238 rotateXYPhase( const casa::CountedPtr<Scantable>& in, float phase);
239
240 casa::CountedPtr<Scantable>
241 rotateLinPolPhase( const casa::CountedPtr<Scantable>& in, float phase);
242
243 casa::CountedPtr<Scantable>
244 swapPolarisations(const casa::CountedPtr<Scantable>& in);
245
246 casa::CountedPtr<Scantable>
247 frequencyAlign( const casa::CountedPtr<Scantable>& in,
248 const std::string& refTime = "",
249 const std::string& method = "cubic" );
250
251 casa::CountedPtr<Scantable>
252 convertPolarisation( const casa::CountedPtr<Scantable>& in,
253 const std::string& newtype);
254
255 casa::CountedPtr<Scantable>
256 mxExtract( const casa::CountedPtr<Scantable>& in,
257 const std::string& srctype = "on");
258
259 /**
260 * "hard" flag the data, this flags everything selected in setSelection()
261 * @param frequency the frequency to remove
262 * @param width the number of lags to flag left to the side of the frequency
263 */
264 casa::CountedPtr<Scantable>
265 lagFlag( const casa::CountedPtr<Scantable>& in, double start,
266 double end, const std::string& mode="frequency");
267
268private:
269 casa::CountedPtr<Scantable> applyToPol( const casa::CountedPtr<Scantable>& in,
270 STPol::polOperation fptr,
271 casa::Float phase);
272
273 static imethod stringToIMethod(const std::string& in);
274 static WeightType stringToWeight(const std::string& in);
275
276 void scaleByVector(casa::Table& in,
277 const casa::Vector<casa::Float>& factor,
278 bool dotsys);
279
280 void scaleFromAsciiTable(casa::Table& in, const std::string& filename,
281 const std::string& method,
282 const casa::Vector<casa::Float>& xout,
283 bool dotsys);
284
285 void scaleFromTable(casa::Table& in, const casa::Table& table,
286 const std::string& method,
287 const casa::Vector<casa::Float>& xout, bool dotsys);
288
289 void convertBrightnessUnits(casa::CountedPtr<Scantable>& in,
290 bool tokelvin, float cfac);
291
292 casa::CountedPtr< Scantable >
293 smoothOther( const casa::CountedPtr< Scantable >& in,
294 const std::string& kernel,
295 float width, int order=2 );
296
297 casa::CountedPtr< Scantable >
298 getScantable(const casa::CountedPtr< Scantable >& in, bool droprows);
299
300 casa::MaskedArray<casa::Float>
301 maskedArray( const casa::Vector<casa::Float>& s,
302 const casa::Vector<casa::uChar>& f );
303 casa::Vector<casa::uChar>
304 flagsFromMA(const casa::MaskedArray<casa::Float>& ma);
305
306 bool insitu_;
307};
308
309}
310#endif
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