gamma.cpp File Reference

Implementation of gamma functions. More...

#include <itpp/base/bessel/bessel_internal.h>
#include <itpp/base/itassert.h>
#include <itpp/base/itcompat.h>
#include <itpp/base/math/misc.h>

Defines
#define	INFINITY   1.79769313486231570815E308
#define	NAN   0.0
Functions
double	gam (double x)
double	lgam (double x)
Variables
int	sgngam = 0

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Detailed Description

Implementation of gamma functions.

Author:

Adam Piatyszek

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Copyright (C) 1995-2008 (see AUTHORS file for a list of contributors)

This file is part of IT++ - a C++ library of mathematical, signal processing, speech processing, and communications classes and functions.

IT++ is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

IT++ is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with IT++. If not, see <http://www.gnu.org/licenses/>.

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This is slightly modified routine from the Cephes library: http://www.netlib.org/cephes/

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Function Documentation

double lgam

(

double

x

)

Logarithm of gamma function

References itpp::floor(), it_warning, itpp::log(), and itpp::sin().