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f216854453
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.
66 lines
1.6 KiB
Plaintext
66 lines
1.6 KiB
Plaintext
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2016 Gael Guennebaud <g.gael@free.fr>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef EIGEN_SPECIALFUNCTIONS_MODULE
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#define EIGEN_SPECIALFUNCTIONS_MODULE
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#include <math.h>
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#include "../../Eigen/Core"
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#include "../../Eigen/src/Core/util/DisableStupidWarnings.h"
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namespace Eigen {
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/**
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* \defgroup SpecialFunctions_Module Special math functions module
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*
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* This module features additional coefficient-wise math functions available
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* within the numext:: namespace for the scalar version, and as method and/or free
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* functions of Array. Those include:
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*
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* - erf
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* - erfc
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* - lgamma
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* - igamma
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* - igammac
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* - digamma
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* - polygamma
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* - zeta
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* - betainc
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* - i0e
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* - i1e
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*
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* \code
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* #include <unsupported/Eigen/SpecialFunctions>
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* \endcode
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*/
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//@{
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}
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#include "src/SpecialFunctions/SpecialFunctionsImpl.h"
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#include "src/SpecialFunctions/SpecialFunctionsPacketMath.h"
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#include "src/SpecialFunctions/SpecialFunctionsHalf.h"
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#include "src/SpecialFunctions/SpecialFunctionsFunctors.h"
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#include "src/SpecialFunctions/SpecialFunctionsArrayAPI.h"
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#if defined EIGEN_VECTORIZE_CUDA
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#include "src/SpecialFunctions/arch/CUDA/CudaSpecialFunctions.h"
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#endif
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namespace Eigen {
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//@}
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}
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#include "../../Eigen/src/Core/util/ReenableStupidWarnings.h"
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#endif // EIGEN_SPECIALFUNCTIONS_MODULE
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