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Thyra_describeLinearOp_def.hpp
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00002 // ***********************************************************************
00003 // 
00004 //    Thyra: Interfaces and Support for Abstract Numerical Algorithms
00005 //                 Copyright (2004) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
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00014 //  
00015 // This library is distributed in the hope that it will be useful, but
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00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
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00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00025 // 
00026 // ***********************************************************************
00027 // @HEADER
00028 
00029 #ifndef THYRA_DESCRIBE_LINEAR_OP_HPP
00030 #define THYRA_DESCRIBE_LINEAR_OP_HPP
00031 
00032 #include "Thyra_describeLinearOp_def.hpp"
00033 #include "Thyra_LinearOpBase.hpp"
00034 #include "Thyra_MultiVectorBase.hpp"
00035 #include "Thyra_VectorStdOps.hpp"
00036 #include "Thyra_AssertOp.hpp"
00037 #include "Thyra_AssertOp.hpp"
00038 
00039 
00040 template<class Scalar>
00041 void Thyra::describeLinearOp(
00042   const LinearOpBase<Scalar> &A,
00043   Teuchos::FancyOStream &out_arg,
00044   const Teuchos::EVerbosityLevel verbLevel
00045   )
00046 {
00047   using Teuchos::RCP;
00048   using Teuchos::FancyOStream;
00049   using Teuchos::OSTab;
00050   typedef Teuchos::ScalarTraits<Scalar> DST;
00051 
00052   RCP<FancyOStream> out = rcp(&out_arg,false);
00053   OSTab tab(out);
00054   *out << A.description() << "\n";
00055 
00056   const Teuchos::RCP<const VectorSpaceBase<Scalar> >
00057     range = A.range();
00058   const Teuchos::RCP<const VectorSpaceBase<Scalar> >
00059     domain = A.domain();
00060 
00061   if(!range.get()) {
00062     return;
00063   }
00064 
00065   const Ordinal dimDomain = domain->dim(), dimRange = range->dim();
00066   if ( dimDomain > 0 && dimRange > 0 && verbLevel >= Teuchos::VERB_EXTREME ) {
00067     // Copy into dense matrix by column
00068     Teuchos::RCP<VectorBase<Scalar> > e_j = createMember(domain);
00069     Teuchos::RCP<VectorBase<Scalar> > t = createMember(range); // temp column
00070     RTOpPack::ConstSubVectorView<Scalar> sv;
00071     Array<Scalar>  Md(dimRange*dimDomain); // Column major
00072     const Ordinal
00073       cs = 1,         // stride for columns or rows 
00074       rs = dimRange;  // stride for rows or columns
00075     Ordinal i, j;
00076     OSTab tab2(out);
00077     for( j = 0; j < dimDomain; ++j ) {
00078       Thyra::assign( e_j.ptr(), DST::zero() );
00079       Thyra::set_ele( j, DST::one(), e_j.ptr() );
00080       Thyra::apply<Scalar>(A, NOTRANS, *e_j, t.ptr());  // extract the ith column or row
00081       t->acquireDetachedView(Range1D(),&sv);
00082       for( i = 0; i < dimRange; ++i ) Md[ i*cs + j*rs ] = sv(i);
00083       t->releaseDetachedView(&sv);
00084     }
00085     // Print the matrix
00086     for( i = 0; i < dimRange; ++i ) {
00087       for( j = 0; j < dimDomain; ++j )
00088         *out << " " << i << ":" << j << ":" << Md[ i + j*dimRange ];
00089       *out << std::endl;
00090     }
00091   }
00092 
00093 }
00094 
00095 
00096 //
00097 // Explicit instant macro
00098 //
00099 
00100 #define THYRA_DESCRIBE_LINEAR_INSTANT(SCALAR) \
00101     \
00102   template void describeLinearOp(  \
00103     const LinearOpBase<SCALAR > &A,  \
00104     Teuchos::FancyOStream &out_arg,  \
00105     const Teuchos::EVerbosityLevel verbLevel  \
00106     );  \
00107 
00108 
00109 
00110 #endif // THYRA_DESCRIBE_LINEAR_OP_HPP
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