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fix #74: sparse triangular solver for lower/row-major matrices

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This commit is contained in:
Gael Guennebaud 2009-12-14 10:20:35 +01:00
parent 72fc81dd9d
commit b581cb870c
2 changed files with 12 additions and 1 deletions
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3
Eigen/src/Sparse/TriangularSolver.h
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@ -43,8 +43,11 @@ struct ei_solve_triangular_selector<Lhs,Rhs,LowerTriangular,RowMajor|IsSparse>
{
lastVal = it.value();
lastIndex = it.index();
if(lastIndex == i)
break;
tmp -= lastVal * other.coeff(lastIndex,col);
}
if (Lhs::Flags & UnitDiagBit)
other.coeffRef(i,col) = tmp;
else

10
test/sparse_solvers.cpp
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@ -68,12 +68,20 @@ template<typename Scalar> void sparse_solvers(int rows, int cols)
VERIFY_IS_APPROX(refMat2.template marked<LowerTriangular>().solveTriangular(vec2),
m2.template marked<LowerTriangular>().solveTriangular(vec3));
// lower - transpose
initSparse<Scalar>(density, refMat2, m2, ForceNonZeroDiag|MakeLowerTriangular, &zeroCoords, &nonzeroCoords);
VERIFY_IS_APPROX(refMat2.template marked<LowerTriangular>().transpose().solveTriangular(vec2),
m2.template marked<LowerTriangular>().transpose().solveTriangular(vec3));
// upper
initSparse<Scalar>(density, refMat2, m2, ForceNonZeroDiag|MakeUpperTriangular, &zeroCoords, &nonzeroCoords);
VERIFY_IS_APPROX(refMat2.template marked<UpperTriangular>().solveTriangular(vec2),
m2.template marked<UpperTriangular>().solveTriangular(vec3));
// TODO test row major
// upper - transpose
initSparse<Scalar>(density, refMat2, m2, ForceNonZeroDiag|MakeUpperTriangular, &zeroCoords, &nonzeroCoords);
VERIFY_IS_APPROX(refMat2.template marked<UpperTriangular>().transpose().solveTriangular(vec2),
m2.template marked<UpperTriangular>().transpose().solveTriangular(vec3));
}
// test LLT