Line data    Source code

       1             : //# ConjugateGradientSolver.h: Definition for an iterative ConjugateGradientSolver
       2             : //# Copyright (C) 1996,1997,1998,1999,2000,2001,2002,2003
       3             : //# Associated Universities, Inc. Washington DC, USA.
       4             : //#
       5             : //# This library is free software; you can redistribute it and/or modify it
       6             : //# under the terms of the GNU Library General Public License as published by
       7             : //# the Free Software Foundation; either version 2 of the License, or (at your
       8             : //# option) any later version.
       9             : //#
      10             : //# This library is distributed in the hope that it will be useful, but WITHOUT
      11             : //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12             : //# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
      13             : //# License for more details.
      14             : //#
      15             : //# You should have received a copy of the GNU Library General Public License
      16             : //# along with this library; if not, write to the Free Software Foundation,
      17             : //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
      18             : //#
      19             : //# Correspondence concerning AIPS++ should be adressed as follows:
      20             : //#        Internet email: casa-feedback@nrao.edu.
      21             : //#        Postal address: AIPS++ Project Office
      22             : //#                        National Radio Astronomy Observatory
      23             : //#                        520 Edgemont Road
      24             : //#                        Charlottesville, VA 22903-2475 USA
      25             : //#
      26             : //#
      27             : //# $Id: ConjugateGradientSolver.h,v 1.2 2006/03/30 23:45:29 sbhatnag Exp $
      28             : 
      29             : #ifndef SYNTHESIS_STEEPESTDESCENT_H
      30             : #define SYNTHESIS_STEEPESTDESCENT_H
      31             : //----------------------------------------------------------------------------
      32             : 
      33             : #include <casacore/casa/aips.h>
      34             : 
      35             : #include <synthesis/MeasurementEquations/VisEquation.h>
      36             : #include <synthesis/MeasurementEquations/Iterate.h>
      37             : #include <synthesis/MeasurementComponents/EPJones.h>
      38             : #include <msvis/MSVis/VisBuffer.h>
      39             : #include <casacore/casa/Arrays/Vector.h>
      40             : #include <casacore/casa/OS/Timer.h>
      41             : 
      42             : #include <casacore/casa/Logging/LogIO.h>
      43             : #include <casacore/casa/Logging/LogSink.h>
      44             : #include <casacore/casa/Logging/LogMessage.h>
      45             : 
      46             : namespace casa {
      47             : 
      48             :   class SteepestDescentSolver: public Iterate
      49             :   {
      50             :   public:
      51             :     SteepestDescentSolver(casacore::Int nParams, casacore::Vector<casacore::Int> polMap, 
      52             :                           casacore::Int nIter=20, casacore::Double tol=1E-5);
      53           0 :     ~SteepestDescentSolver(){};
      54             : 
      55           0 :     void setMaxParams(casacore::Int nParams){maxParams=nParams;};
      56             :     
      57             :     casacore::Double solve(VisEquation& ve, EPJones& vj, VisBuffer& vb,
      58             :                  casacore::Int nAnt, casacore::Int SlotNo);
      59             : 
      60             :     casacore::Double solve2(VisEquation& ve, VisIter& vi, EPJones& epj, casacore::Int nAnt, casacore::Int SlotNo);
      61             : 
      62           0 :     casacore::LogIO& logIO() {return logIO_p;};
      63             :     
      64             :   private:
      65             :     casacore::Vector<casacore::Complex> getVj(const VisBuffer& vb, casacore::Int NAnt, casacore::Int whichAnt, casacore::Int whichPol,
      66             :                           casacore::Double& sumWt,casacore::Int negate=0, casacore::Int weighted=1);
      67             :     casacore::Double getGOF(const VisBuffer& residual,casacore::Int& whichPol, casacore::Double& sumWt,const char *msg="");
      68             : 
      69             :     casacore::Int /*maxIter,*/ maxParams;
      70             :     
      71             :     VisBuffer residual_p,gradient0_p,gradient1_p;
      72             :     casacore::Matrix<casacore::Bool> flags;
      73             : 
      74             :     casacore::LogIO logIO_p;
      75             :     casacore::Vector<casacore::Int> polMap_p;
      76             :   };
      77             : };
      78             : 
      79             : #endif