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Sparse module: add a more flexible SparseMatrix::fillrand() function

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which allows to fill a matrix with random inner coordinates (makes sense
only when a very few coeffs are inserted per col/row)
This commit is contained in:
Gael Guennebaud
2008-12-11 18:26:24 +00:00
parent beabf008b0
commit 5015e48361
4 changed files with 68 additions and 5 deletions
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20
test/sparse_basic.cpp
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@@ -153,6 +153,26 @@ template<typename Scalar> void sparse_basic(int rows, int cols)
#ifdef _SPARSE_HASH_MAP_H_
VERIFY(( test_random_setter<RandomSetter<SparseMatrix<Scalar>, GoogleSparseHashMapTraits> >(m,refMat,nonzeroCoords) ));
#endif
// test fillrand
{
DenseMatrix m1(rows,cols);
m1.setZero();
SparseMatrix<Scalar> m2(rows,cols);
m2.startFill();
for (int j=0; j<cols; ++j)
{
for (int k=0; k<rows/2; ++k)
{
int i = ei_random<int>(0,rows-1);
if (m1.coeff(i,j)==Scalar(0))
m2.fillrand(i,j) = m1(i,j) = ei_random<Scalar>();
}
}
m2.endFill();
std::cerr << m1 << "\n\n" << m2 << "\n";
VERIFY_IS_APPROX(m1,m2);
}
// {
// m.setZero();
// VERIFY_IS_NOT_APPROX(m, refMat);