diff options
| author |  Srinivas Vasudevan <srvasude@gmail.com> | 2016-12-02 14:13:01 -0800 |
|---|---|---|
| committer | Srinivas Vasudevan <srvasude@gmail.com> | 2016-12-02 14:13:01 -0800 |
| commit | 218764ee1f0a21e1faf20ed314ffafeae79eb170 (patch) | |
| tree | fc8901c4b69b57f889b3a88e94ec162e4c19bd98 /Eigen/src/plugins | |
| parent | 27873008d431a307bed9c200a12622a361af4d14 (diff) | |
Added support for expm1 in Eigen.
Diffstat (limited to 'Eigen/src/plugins')
| -rw-r--r-- | Eigen/src/plugins/ArrayCwiseUnaryOps.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/Eigen/src/plugins/ArrayCwiseUnaryOps.h b/Eigen/src/plugins/ArrayCwiseUnaryOps.h index ebaa3f192..43615bd56 100644 --- a/Eigen/src/plugins/ArrayCwiseUnaryOps.h +++ b/Eigen/src/plugins/ArrayCwiseUnaryOps.h @@ -10,6 +10,7 @@ typedef CwiseUnaryOp<internal::scalar_inverse_op<Scalar>, const Derived> Inverse typedef CwiseUnaryOp<internal::scalar_boolean_not_op<Scalar>, const Derived> BooleanNotReturnType; typedef CwiseUnaryOp<internal::scalar_exp_op<Scalar>, const Derived> ExpReturnType; +typedef CwiseUnaryOp<internal::scalar_expm1_op<Scalar>, const Derived> Expm1ReturnType; typedef CwiseUnaryOp<internal::scalar_log_op<Scalar>, const Derived> LogReturnType; typedef CwiseUnaryOp<internal::scalar_log1p_op<Scalar>, const Derived> Log1pReturnType; typedef CwiseUnaryOp<internal::scalar_log10_op<Scalar>, const Derived> Log10ReturnType; @@ -90,6 +91,20 @@ exp() const return ExpReturnType(derived()); } +/** \returns an expression of the coefficient-wise exponential of *this minus 1. + * + * In exact arithmetic, \c x.expm1() is equivalent to \c x.exp() - 1, + * however, with finite precision, this function is much more accurate when \c x is close to zero. + * + * \sa <a href="group__CoeffwiseMathFunctions.html#cwisetable_expm1">Math functions</a>, exp() + */ +EIGEN_DEVICE_FUNC +inline const Expm1ReturnType +expm1() const +{ + return Expm1ReturnType(derived()); +} + /** \returns an expression of the coefficient-wise logarithm of *this. * * This function computes the coefficient-wise logarithm. The function MatrixBase::log() in the @@ -98,7 +113,7 @@ exp() const * Example: \include Cwise_log.cpp * Output: \verbinclude Cwise_log.out * - * \sa <a href="group__CoeffwiseMathFunctions.html#cwisetable_log">Math functions</a>, exp() + * \sa <a href="group__CoeffwiseMathFunctions.html#cwisetable_log">Math functions</a>, log() */ EIGEN_DEVICE_FUNC inline const LogReturnType |