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PermutationMatrix: add setIdentity and transpositions methods

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LU: make use of that
This commit is contained in:
Benoit Jacob
2009-11-16 21:28:26 -05:00
parent b90744dc05
commit 07412b2075
4 changed files with 90 additions and 18 deletions
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24
test/permutationmatrices.cpp
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@@ -81,6 +81,30 @@ template<typename MatrixType> void permutationmatrices(const MatrixType& m)
LeftPermutationType lp2(lv2);
Matrix<Scalar,Rows,Rows> lm2(lp2);
VERIFY_IS_APPROX((lp*lp2).toDenseMatrix().template cast<Scalar>(), lm*lm2);
LeftPermutationType identityp;
identityp.setIdentity(rows);
VERIFY_IS_APPROX(m_original, identityp*m_original);
if(rows>1 && cols>1)
{
lp2 = lp;
int i = ei_random<int>(0, rows-1);
int j;
do j = ei_random<int>(0, rows-1); while(j==i);
lp2.applyTranspositionOnTheLeft(i, j);
lm = lp;
lm.row(i).swap(lm.row(j));
VERIFY_IS_APPROX(lm, lp2.toDenseMatrix().template cast<Scalar>());
RightPermutationType rp2 = rp;
i = ei_random<int>(0, cols-1);
do j = ei_random<int>(0, cols-1); while(j==i);
rp2.applyTranspositionOnTheRight(i, j);
rm = rp;
rm.col(i).swap(rm.col(j));
VERIFY_IS_APPROX(rm, rp2.toDenseMatrix().template cast<Scalar>());
}
}
void test_permutationmatrices()