diff options
Diffstat (limited to 'test/qr_colpivoting.cpp')
| -rw-r--r-- | test/qr_colpivoting.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/test/qr_colpivoting.cpp b/test/qr_colpivoting.cpp index ef3a6173b..38de635a7 100644 --- a/test/qr_colpivoting.cpp +++ b/test/qr_colpivoting.cpp @@ -204,9 +204,11 @@ template<typename MatrixType> void qr_kahan_matrix() m1.setZero(rows,cols); RealScalar s = std::pow(NumTraits<RealScalar>::epsilon(), 1.0 / rows); RealScalar c = std::sqrt(1 - s*s); + RealScalar pow_s_i(1.0); // pow(s,i) for (Index i = 0; i < rows; ++i) { - m1(i, i) = pow(s, i); - m1.row(i).tail(rows - i - 1) = -RealScalar(pow(s, i)) * c * MatrixType::Ones(1, rows - i - 1); + m1(i, i) = pow_s_i; + m1.row(i).tail(rows - i - 1) = -pow_s_i * c * MatrixType::Ones(1, rows - i - 1); + pow_s_i *= s; } m1 = (m1 + m1.transpose()).eval(); ColPivHouseholderQR<MatrixType> qr(m1); |