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Added support for expm1 in Eigen.

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This commit is contained in:
Srinivas Vasudevan
2016-12-02 14:13:01 -08:00
parent 27873008d4
commit 218764ee1f
15 changed files with 171 additions and 13 deletions
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17
Eigen/src/plugins/ArrayCwiseUnaryOps.h
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@@ -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