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//# NNLSMatrixSolver.cc: concrete class for NNLS solvers of AX=B
//# Copyright (C) 1994,1995,1999,2001,2002,2003
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: casa-feedback@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
#include <casacore/casa/aips.h>
#include <casacore/scimath/Mathematics/NNLSMatrixSolver.h>
#include <casacore/casa/Arrays/MatrixMath.h>
#include <casacore/casa/Logging/LogSink.h>
#include <casacore/casa/Logging/LogMessage.h>
#include <casacore/casa/sstream.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
#if !defined(NEED_FORTRAN_UNDERSCORES)
#define NEED_FORTRAN_UNDERSCORES 1
#endif
#if NEED_FORTRAN_UNDERSCORES
#define nnls nnls_
#endif
extern "C" {
void nnls(FType*,int*,int*,int*,FType*,FType*,float*,FType*,FType*,int*,int*,int*);
}
// Default Constructor
NNLSMatrixSolver::NNLSMatrixSolver(): MatrixSolver() {}
// Copy Constructor
NNLSMatrixSolver::NNLSMatrixSolver(const NNLSMatrixSolver & other)
: MatrixSolver(other) {}
// Create a NNLSMatrixSolver from a matrix A and a Vector B
// <note role=warning> A and B are accessed by reference, so don't
// modify them during the lifetime of the NNLSMatrixSolver </note>
NNLSMatrixSolver::NNLSMatrixSolver(const Matrix<FType> & A,
const Vector<FType> & B)
: MatrixSolver(A,B) {}
// Destructor
NNLSMatrixSolver::~NNLSMatrixSolver() {}
Bool NNLSMatrixSolver::solve() // Solve AX=B for X
{
LogMessage message(LogOrigin("NNLSMatrixSolver","solve"));
Bool delete_it;
FType *a_data = AMatrix.getStorage(delete_it);
FType *x_data = XVector.getStorage(delete_it);
FType *b_data = BVector.getStorage(delete_it);
int nflux=XVector.nelements();
int ndata=BVector.nelements();
float rnorm=0.0;
FType *w=new FType[nflux];
FType *zz=new FType[ndata];
int *index=new int[nflux];
int itmax=MaxIters();
if(itmax==0) itmax=3*nflux;
int mode=0;
// Call Fortran NNLS routine
nnls(a_data,&ndata,&ndata,&nflux,b_data,x_data,&rnorm,w,zz,index,&itmax,
&mode);
RVector=BVector-product(AMatrix,XVector); // Update residual vector
if (mode==2) {
ostringstream o;o<<"dimensions set up incorrectly";
message.priority(LogMessage::SEVERE);
message.message(o);logSink().post(message);
setSolved(False);
return Solved();
}
if (mode==3) {
ostringstream o;o<<"Exceeded number of iterations";
message.priority(LogMessage::SEVERE);
message.message(o);logSink().post(message);
setSolved(False);
return Solved();
}
if(accurateSolution()) {
ostringstream o;o<<"Solution acheived";
message.message(o);logSink().post(message);
setSolved(True);
}
else {
ostringstream o;o<<"Solution not formally accurate enough";
message.message(o);logSink().post(message);
setSolved(False);
}
return Solved();
}
} //# NAMESPACE CASACORE - END
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