C++ SparseMatrixType::size2方法代码示例

    typename viennacl::enable_if< viennacl::is_any_sparse_matrix<SparseMatrixType>::value>::type
    inplace_solve(const SparseMatrixType & mat,
                  viennacl::vector_base<ScalarType> & vec,
                  SOLVERTAG tag)
    {
      assert( (mat.size1() == mat.size2()) && bool("Size check failed for triangular solve on compressed matrix: size1(mat) != size2(mat)"));
      assert( (mat.size2() == vec.size())    && bool("Size check failed for compressed matrix-vector product: size2(mat) != size(x)"));

      switch (viennacl::traits::handle(mat).get_active_handle_id())
      {
        case viennacl::MAIN_MEMORY:
          viennacl::linalg::host_based::inplace_solve(mat, vec, tag);
          break;
#ifdef VIENNACL_WITH_OPENCL
        case viennacl::OPENCL_MEMORY:
          viennacl::linalg::opencl::inplace_solve(mat, vec, tag);
          break;
#endif
#ifdef VIENNACL_WITH_CUDA
        case viennacl::CUDA_MEMORY:
          viennacl::linalg::cuda::inplace_solve(mat, vec, tag);
          break;
#endif
        case viennacl::MEMORY_NOT_INITIALIZED:
          throw memory_exception("not initialised!");
        default:
          throw memory_exception("not implemented");
      }
    }

typename viennacl::enable_if< viennacl::is_any_sparse_matrix<SparseMatrixType>::value>::type
assign_to_dense(SparseMatrixType const & A,
                viennacl::matrix_base<NumericT> & B)
{
  assert( (A.size1() == B.size1()) && bool("Size check failed for assignment to dense matrix: size1(A) != size1(B)"));
  assert( (A.size2() == B.size1()) && bool("Size check failed for assignment to dense matrix: size2(A) != size2(B)"));

  switch (viennacl::traits::handle(A).get_active_handle_id())
  {
    case viennacl::MAIN_MEMORY:
      viennacl::linalg::host_based::amg::assign_to_dense(A, B);
      break;
#ifdef VIENNACL_WITH_OPENCL
    case viennacl::OPENCL_MEMORY:
      viennacl::linalg::opencl::amg::assign_to_dense(A, B);
      break;
#endif
#ifdef VIENNACL_WITH_CUDA
    case viennacl::CUDA_MEMORY:
      viennacl::linalg::cuda::amg::assign_to_dense(A, B);
      break;
#endif
    case viennacl::MEMORY_NOT_INITIALIZED:
      throw memory_exception("not initialised!");
    default:
      throw memory_exception("not implemented");
  }
}

void initPreconditioner(const SparseMatrixType& A, SparseMatrixType& M)
{
    typedef typename SparseMatrixType::value_type ScalarType;
    M.resize(A.size1(), A.size2(), false);
    for(typename SparseMatrixType::const_iterator1 row_it = A.begin1(); row_it!= A.end1(); ++row_it)
    {
        //
        for(typename SparseMatrixType::const_iterator2 col_it = row_it.begin(); col_it != row_it.end(); ++col_it)
        {
            M(col_it.index1(),col_it.index2()) = static_cast<ScalarType>(1);
        }
    }
}

    bool SuperLUSolver::Solve(SparseMatrixType& rA, VectorType& rX, VectorType& rB)
    {
        //std::cout << "matrix size in solver:  " << rA.size1() << std::endl;
        //std::cout << "RHS size in solver SLU: " << rB.size() << std::endl;

//               typedef ublas::compressed_matrix<double, ublas::row_major, 0,
//                 ublas::unbounded_array<int>, ublas::unbounded_array<double> > cm_t;

	    //make a copy of the RHS
	    VectorType rC = rB;

        superlu_options_t options;
        SuperLUStat_t stat;

        /* Set the default input options:
            options.Fact = DOFACT;
            options.Equil = YES;
            options.ColPerm = COLAMD;
            options.DiagPivotThresh = 1.0;
            options.Trans = NOTRANS;
            options.IterRefine = NOREFINE;
            options.SymmetricMode = NO;
            options.PivotGrowth = NO;
            options.ConditionNumber = NO;
            options.PrintStat = YES;
        */
        set_default_options(&options);
        options.IterRefine = SLU_DOUBLE;
// 		options.ColPerm = MMD_AT_PLUS_A;

        //Fill the SuperLU matrices
        SuperMatrix Aslu, B, L, U;

        //create a copy of the matrix
        int *index1_vector = new (std::nothrow) int[rA.index1_data().size()];
        int *index2_vector = new (std::nothrow) int[rA.index2_data().size()];
// 		double *values_vector = new (std::nothrow) double[rA.value_data().size()];

        for( int unsigned i = 0; i < rA.index1_data().size(); i++ )
            index1_vector[i] = (int)rA.index1_data()[i];

        for( unsigned int i = 0; i < rA.index2_data().size(); i++ )
            index2_vector[i] = (int)rA.index2_data()[i];

        /*		for( unsigned int i = 0; i < rA.value_data().size(); i++ )
        		    values_vector[i] = (double)rA.value_data()[i];*/

        //create a copy of the rhs vector (it will be overwritten with the solution)
        /*		double *b_vector = new (std::nothrow) double[rB.size()];
        		for( unsigned int i = 0; i < rB.size(); i++ )
        		    b_vector[i] = rB[i];*/
        /*
        		dCreate_CompCol_Matrix (&Aslu, rA.size1(), rA.size2(),
        					       rA.nnz(),
        					      values_vector,
        					      index2_vector,
         					      index1_vector,
        					      SLU_NR, SLU_D, SLU_GE
        					      );*/

        //works also with dCreate_CompCol_Matrix
        dCreate_CompRow_Matrix (&Aslu, rA.size1(), rA.size2(),
                                rA.nnz(),
                                rA.value_data().begin(),
                                index2_vector, //can not avoid a copy as ublas uses unsigned int internally
                                index1_vector, //can not avoid a copy as ublas uses unsigned int internally
                                SLU_NR, SLU_D, SLU_GE
                               );

        dCreate_Dense_Matrix (&B, rB.size(), 1,&rB[0],rB.size(),SLU_DN, SLU_D, SLU_GE);

        //allocate memory for permutation arrays
        int* perm_c;
        int* perm_r;
        if ( !(perm_c = intMalloc(rA.size1())) ) ABORT("Malloc fails for perm_c[].");
        if ( !(perm_r = intMalloc(rA.size2())) ) ABORT("Malloc fails for perm_r[].");


        //initialize container for statistical data
        StatInit(&stat);

        //call solver routine
        int info;
        dgssv(&options, &Aslu, perm_c, perm_r, &L, &U, &B, &stat, &info);

        //print output
        if (options.PrintStat) {
        StatPrint(&stat);
        }

        //resubstitution of results
        #pragma omp parallel for
        for(int i=0; i<static_cast<int>(rB.size()); i++ )
            rX[i] = rB[i]; // B(i,0);

	    //recover the RHS
	    rB=rC;

        //deallocate memory used
        StatFree(&stat);
//.........这里部分代码省略.........