Function sparse_basic

external/eigen3/test/sparse_basic.cpp:14–549

#include "sparse.h"

template<typename SparseMatrixType> void sparse_basic(const SparseMatrixType& ref)
{
  typedef typename SparseMatrixType::Index Index;
  typedef Matrix<Index,2,1> Vector2;
  
  const Index rows = ref.rows();
  const Index cols = ref.cols();
  typedef typename SparseMatrixType::Scalar Scalar;
  enum { Flags = SparseMatrixType::Flags };

  double density = (std::max)(8./(rows*cols), 0.01);
  typedef Matrix<Scalar,Dynamic,Dynamic> DenseMatrix;
  typedef Matrix<Scalar,Dynamic,1> DenseVector;
  typedef Matrix<Scalar,1,Dynamic> RowDenseVector;
  Scalar eps = 1e-6;

  Scalar s1 = internal::random<Scalar>();
  {
    SparseMatrixType m(rows, cols);
    DenseMatrix refMat = DenseMatrix::Zero(rows, cols);
    DenseVector vec1 = DenseVector::Random(rows);

    std::vector<Vector2> zeroCoords;
    std::vector<Vector2> nonzeroCoords;
    initSparse<Scalar>(density, refMat, m, 0, &zeroCoords, &nonzeroCoords);

    if (zeroCoords.size()==0 || nonzeroCoords.size()==0)
      return;

    // test coeff and coeffRef
    for (int i=0; i<(int)zeroCoords.size(); ++i)
    {
      VERIFY_IS_MUCH_SMALLER_THAN( m.coeff(zeroCoords[i].x(),zeroCoords[i].y()), eps );
      if(internal::is_same<SparseMatrixType,SparseMatrix<Scalar,Flags> >::value)
        VERIFY_RAISES_ASSERT( m.coeffRef(zeroCoords[0].x(),zeroCoords[0].y()) = 5 );
    }
    VERIFY_IS_APPROX(m, refMat);

    m.coeffRef(nonzeroCoords[0].x(), nonzeroCoords[0].y()) = Scalar(5);
    refMat.coeffRef(nonzeroCoords[0].x(), nonzeroCoords[0].y()) = Scalar(5);

    VERIFY_IS_APPROX(m, refMat);
      
      // test InnerIterators and Block expressions
      for (int t=0; t<10; ++t)
      {
        int j = internal::random<int>(0,cols-1);
        int i = internal::random<int>(0,rows-1);
        int w = internal::random<int>(1,cols-j-1);
        int h = internal::random<int>(1,rows-i-1);

        VERIFY_IS_APPROX(m.block(i,j,h,w), refMat.block(i,j,h,w));
        for(int c=0; c<w; c++)
        {
          VERIFY_IS_APPROX(m.block(i,j,h,w).col(c), refMat.block(i,j,h,w).col(c));
          for(int r=0; r<h; r++)
          {
            VERIFY_IS_APPROX(m.block(i,j,h,w).col(c).coeff(r), refMat.block(i,j,h,w).col(c).coeff(r));