diff options
| author |  Michael Figurnov <mfigurnov@google.com> | 2018-05-31 15:34:53 +0100 |
|---|---|---|
| committer | Michael Figurnov <mfigurnov@google.com> | 2018-05-31 15:34:53 +0100 |
| commit | f216854453887f31ac02ffefb7a7a569dc3fa54d (patch) | |
| tree | bf748705db0da48a0dc8c08989184bcb888861fd /unsupported/Eigen/CXX11/src/Tensor/TensorBase.h | |
| parent | 6af1433cb50af7423a1a69afc24c098af9c76bb1 (diff) | |
Exponentially scaled modified Bessel functions of order zero and one.
The functions are conventionally called i0e and i1e. The exponentially scaled version is more numerically stable. The standard Bessel functions can be obtained as i0(x) = exp(|x|) i0e(x)
The code is ported from Cephes and tested against SciPy.
Diffstat (limited to 'unsupported/Eigen/CXX11/src/Tensor/TensorBase.h')
| -rw-r--r-- | unsupported/Eigen/CXX11/src/Tensor/TensorBase.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h b/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h index 745b16d2c..a942c98dd 100644 --- a/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h +++ b/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h @@ -133,6 +133,18 @@ class TensorBase<Derived, ReadOnlyAccessors> return unaryExpr(internal::scalar_digamma_op<Scalar>()); } + EIGEN_DEVICE_FUNC + EIGEN_STRONG_INLINE const TensorCwiseUnaryOp<internal::scalar_i0e_op<Scalar>, const Derived> + i0e() const { + return unaryExpr(internal::scalar_i0e_op<Scalar>()); + } + + EIGEN_DEVICE_FUNC + EIGEN_STRONG_INLINE const TensorCwiseUnaryOp<internal::scalar_i1e_op<Scalar>, const Derived> + i1e() const { + return unaryExpr(internal::scalar_i1e_op<Scalar>()); + } + // igamma(a = this, x = other) template<typename OtherDerived> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const TensorCwiseBinaryOp<internal::scalar_igamma_op<Scalar>, const Derived, const OtherDerived> |