26 #ifndef EIGEN_BLOCK_HOUSEHOLDER_H
27 #define EIGEN_BLOCK_HOUSEHOLDER_H
36 template<
typename TriangularFactorType,
typename VectorsType,
typename CoeffsType>
39 typedef typename TriangularFactorType::Index Index;
40 typedef typename VectorsType::Scalar Scalar;
41 const Index nbVecs = vectors.cols();
42 eigen_assert(triFactor.rows() == nbVecs && triFactor.cols() == nbVecs && vectors.rows()>=nbVecs);
44 for(Index i = 0; i < nbVecs; i++)
46 Index rs = vectors.rows() - i;
47 Scalar Vii = vectors(i,i);
48 vectors.const_cast_derived().coeffRef(i,i) = Scalar(1);
49 triFactor.col(i).head(i).noalias() = -hCoeffs(i) * vectors.block(i, 0, rs, i).adjoint()
50 * vectors.col(i).tail(rs);
51 vectors.const_cast_derived().coeffRef(i, i) = Vii;
53 triFactor.col(i).head(i) = triFactor.block(0,0,i,i).template triangularView<Upper>()
54 * triFactor.col(i).head(i);
55 triFactor(i,i) = hCoeffs(i);
60 template<
typename MatrixType,
typename VectorsType,
typename CoeffsType>
63 typedef typename MatrixType::Index Index;
64 enum { TFactorSize = MatrixType::ColsAtCompileTime };
65 Index nbVecs = vectors.cols();
72 Matrix<
typename MatrixType::Scalar,VectorsType::ColsAtCompileTime,MatrixType::ColsAtCompileTime,0,
73 VectorsType::MaxColsAtCompileTime,MatrixType::MaxColsAtCompileTime> tmp = V.
adjoint() * mat;
75 tmp = T.template triangularView<Upper>().adjoint() * tmp;
83 #endif // EIGEN_BLOCK_HOUSEHOLDER_H