diff options
Diffstat (limited to 'Eigen/src/Core/Fuzzy.h')
| -rw-r--r-- | Eigen/src/Core/Fuzzy.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/Eigen/src/Core/Fuzzy.h b/Eigen/src/Core/Fuzzy.h index e689fc913..0b2305c57 100644 --- a/Eigen/src/Core/Fuzzy.h +++ b/Eigen/src/Core/Fuzzy.h @@ -63,7 +63,10 @@ bool MatrixBase<Derived>::isApprox( * \note The fuzzy compares are done multiplicatively. A vector \f$ v \f$ is * considered to be much smaller than \f$ x \f$ within precision \f$ p \f$ if * \f[ \Vert v \Vert \leqslant p\,\vert x\vert. \f] - * For matrices, the comparison is done using the Hilbert-Schmidt norm. + * + * For matrices, the comparison is done using the Hilbert-Schmidt norm. For this reason, + * the value of the reference scalar \a other should come from the Hilbert-Schmidt norm + * of a reference matrix of same dimensions. * * \sa isApprox(), isMuchSmallerThan(const MatrixBase<OtherDerived>&, RealScalar) const */ @@ -73,7 +76,7 @@ bool MatrixBase<Derived>::isMuchSmallerThan( typename NumTraits<Scalar>::Real prec ) const { - return cwiseAbs2().sum() <= prec * prec * other * other * cols() * rows(); + return cwiseAbs2().sum() <= prec * prec * other * other; } /** \returns \c true if the norm of \c *this is much smaller than the norm of \a other, |