Tsqr_nodeTestProblem.hpp

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//                 Anasazi: Block Eigensolvers Package
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#ifndef __TSQR_Test_nodeTestProblem_hpp
#define __TSQR_Test_nodeTestProblem_hpp

#include <Tsqr_Random_MatrixGenerator.hpp>
#include <Tsqr_ScalarTraits.hpp>

#include <algorithm>
#include <vector>


namespace TSQR {
  namespace Test {

    template< class Ordinal, class Scalar, class Generator >
    void
    nodeTestProblem (Generator& generator,
         const Ordinal nrows, 
         const Ordinal ncols,
         Scalar A[],
         const Ordinal lda,
         const bool numerically_interesting)
    {
      typedef TSQR::Random::MatrixGenerator< Ordinal, Scalar, Generator > matgen_type; 
      matgen_type matGen (generator);
      
      if (numerically_interesting)
  {
    typedef typename ScalarTraits< Scalar >::magnitude_type magnitude_type;

    std::vector< magnitude_type > singular_values (std::min(nrows, ncols));
    singular_values[0] = magnitude_type (1);
    for (Ordinal k = 1; k < std::min(nrows, ncols); ++k)
      singular_values[k] = singular_values[k-1] / magnitude_type(2);

    matGen.fill_random_svd (nrows, ncols, A, lda, &singular_values[0]);
  }
      else
  matGen.fill_random (nrows, ncols, A, lda);
    }

  } // namespace Test
} // namespace TSQR

#endif // __TSQR_Test_nodeTestProblem_hpp