Thyra_describeLinearOp.hpp

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00004 //    Thyra: Interfaces and Support for Abstract Numerical Algorithms
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00028 
00029 #ifndef THYRA_DESCRIBE_LINEAR_OP_HPP
00030 #define THYRA_DESCRIBE_LINEAR_OP_HPP
00031 
00032 #include "Thyra_describeLinearOpDecl.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 template<class RangeScalar, class DomainScalar>
00040 void Thyra::describeLinearOp(
00041   const LinearOpBase<RangeScalar,DomainScalar>   &A
00042   ,Teuchos::FancyOStream                         &out_arg
00043   ,const Teuchos::EVerbosityLevel                verbLevel
00044   )
00045 {
00046   using Teuchos::RefCountPtr;
00047   using Teuchos::FancyOStream;
00048   using Teuchos::OSTab;
00049   typedef Teuchos::ScalarTraits<DomainScalar> DST;
00050   RefCountPtr<FancyOStream> out = rcp(&out_arg,false);
00051   OSTab tab(out);
00052   *out << A.description();
00053   const Teuchos::RefCountPtr<const VectorSpaceBase<RangeScalar> >
00054     range = A.range();
00055   const Teuchos::RefCountPtr<const VectorSpaceBase<DomainScalar> >
00056     domain = A.domain();
00057   if(!range.get()) {
00058     *out << "{range=NULL,domain=NULL}\n"; 
00059     return;
00060   }
00061   const Index dimDomain = domain->dim(), dimRange = range->dim();
00062   *out
00063     << "{rangeDim=" << dimRange
00064     << ",domainDim=" << dimDomain << "}\n";
00065   if(verbLevel >= Teuchos::VERB_EXTREME) {
00066     // Copy into dense matrix by column
00067     Teuchos::RefCountPtr<VectorBase<DomainScalar> > e_j = createMember(A.domain());
00068     Teuchos::RefCountPtr<VectorBase<RangeScalar> >  t   = createMember(A.range()); // temp column
00069     RTOpPack::ConstSubVectorView<RangeScalar> sv;
00070     std::vector<RangeScalar>  Md( dimRange * dimDomain ); // Column major
00071     const Index
00072       cs = 1,         // stride for columns or rows 
00073       rs = dimRange;  // stride for rows or columns
00074     Index i, j;
00075     OSTab tab(out);
00076     for( j = 0; j < dimDomain; ++j ) {
00077       Thyra::assign( e_j.get(), DST::zero() );
00078       Thyra::set_ele( j, DST::one(), e_j.get() );
00079       apply(A,NONCONJ_ELE,*e_j,t.get());  // extract the ith column or row
00080       t->acquireDetachedView(Range1D(),&sv);
00081       for( i = 0; i < dimRange; ++i ) Md[ i*cs + j*rs ] = sv(i);
00082       t->releaseDetachedView(&sv);
00083     }
00084     // Print the matrix
00085     for( i = 0; i < dimRange; ++i ) {
00086       for( j = 0; j < dimDomain; ++j )
00087         *out << " " << i << ":" << j << ":" << Md[ i + j*dimRange ];
00088       *out << std::endl;
00089     }
00090   }
00091 }
00092 
00093 #endif // THYRA_DESCRIBE_LINEAR_OP_HPP

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