Anasazi Version of the Day
Tsqr_nodeTestProblem.hpp
00001 // @HEADER
00002 // ***********************************************************************
00003 //
00004 //                 Anasazi: Block Eigensolvers Package
00005 //                 Copyright (2010) Sandia Corporation
00006 //
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
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
00013 // License, or (at your option) any later version.
00014 //
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
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
00021 // License along with this library; if not, write to the Free Software
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 __TSQR_Test_nodeTestProblem_hpp
00030 #define __TSQR_Test_nodeTestProblem_hpp
00031 
00032 #include <Tsqr_Random_MatrixGenerator.hpp>
00033 #include <Tsqr_ScalarTraits.hpp>
00034 
00035 #include <algorithm>
00036 #include <vector>
00037 
00040 
00041 namespace TSQR {
00042   namespace Test {
00043 
00046     template< class Ordinal, class Scalar, class Generator >
00047     void
00048     nodeTestProblem (Generator& generator,
00049          const Ordinal nrows, 
00050          const Ordinal ncols,
00051          Scalar A[],
00052          const Ordinal lda,
00053          const bool numerically_interesting)
00054     {
00055       typedef TSQR::Random::MatrixGenerator< Ordinal, Scalar, Generator > matgen_type; 
00056       matgen_type matGen (generator);
00057       
00058       if (numerically_interesting)
00059   {
00060     typedef typename ScalarTraits< Scalar >::magnitude_type magnitude_type;
00061 
00062     std::vector< magnitude_type > singular_values (std::min(nrows, ncols));
00063     singular_values[0] = magnitude_type (1);
00064     for (Ordinal k = 1; k < std::min(nrows, ncols); ++k)
00065       singular_values[k] = singular_values[k-1] / magnitude_type(2);
00066 
00067     matGen.fill_random_svd (nrows, ncols, A, lda, &singular_values[0]);
00068   }
00069       else
00070   matGen.fill_random (nrows, ncols, A, lda);
00071     }
00072 
00073   } // namespace Test
00074 } // namespace TSQR
00075 
00076 #endif // __TSQR_Test_nodeTestProblem_hpp
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends