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Fix setFromTripplet with empty inputs

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This commit is contained in:
Gael Guennebaud 2013-05-03 14:28:37 +02:00
parent aa8b897607
commit fcdbfabf7a
1 changed files with 14 additions and 11 deletions
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3
Eigen/src/SparseCore/SparseMatrix.h
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@ -911,6 +911,8 @@ void set_from_triplets(const InputIterator& begin, const InputIterator& end, Spa
typedef typename SparseMatrixType::Scalar Scalar; typedef typename SparseMatrixType::Scalar Scalar;
SparseMatrix<Scalar,IsRowMajor?ColMajor:RowMajor> trMat(mat.rows(),mat.cols()); SparseMatrix<Scalar,IsRowMajor?ColMajor:RowMajor> trMat(mat.rows(),mat.cols());
if(begin<end)
{
// pass 1: count the nnz per inner-vector // pass 1: count the nnz per inner-vector
VectorXi wi(trMat.outerSize()); VectorXi wi(trMat.outerSize());
wi.setZero(); wi.setZero();
@ -924,6 +926,7 @@ void set_from_triplets(const InputIterator& begin, const InputIterator& end, Spa
// pass 3: // pass 3:
trMat.sumupDuplicates(); trMat.sumupDuplicates();
}
// pass 4: transposed copy -> implicit sorting // pass 4: transposed copy -> implicit sorting
mat = trMat; mat = trMat;