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/*!
* \file
* \brief Implementation of Bessel functions
* \author Tony Ottosson
*
* -------------------------------------------------------------------------
*
* IT++ - C++ library of mathematical, signal processing, speech processing,
* and communications classes and functions
*
* Copyright (C) 1995-2008 (see AUTHORS file for a list of contributors)
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* -------------------------------------------------------------------------
*/
#include <itpp/base/bessel.h>
#include <itpp/base/bessel/bessel_internal.h>
#ifndef _MSC_VER
# include <itpp/config.h>
#else
# include <itpp/config_msvc.h>
#endif
namespace itpp {
// Bessel function of order nu
double besselj(int nu, double x) { return jn(nu, x); }
vec besselj(int nu, const vec &x)
{
vec out(x.size());
for (int i=0; i<x.size(); i++)
out(i) = jn(nu, x(i));
return out;
}
// Bessel function of order nu. nu is real.
double besselj(double nu, double x) { return jv(nu, x); }
vec besselj(double nu, const vec &x)
{
vec out(x.size());
for (int i=0; i<x.size(); i++)
out(i) = jv(nu, x(i));
return out;
}
// Bessel function of second kind of order nu
double bessely(int nu, double x) { return yn(nu, x); }
vec bessely(int nu, const vec &x)
{
vec out(x.size());
for (int i=0; i<x.size(); i++)
out(i) = yn(nu, x(i));
return out;
}
// Bessel function of second kind of order nu
double bessely(double nu, double x) { return yv(nu, x); }
vec bessely(double nu, const vec &x)
{
vec out(x.size());
for (int i=0; i<x.size(); i++)
out(i) = yv(nu, x(i));
return out;
}
// Modified Bessel function of order nu
double besseli(double nu, double x) { return iv(nu, x); }
vec besseli(double nu, const vec &x)
{
vec out(x.size());
for (int i=0; i<x.size(); i++)
out(i) = iv(nu, x(i));
return out;
}
// Modified Bessel function of second kind of order n
double besselk(int n, double x) { return kn(n, x); }
vec besselk(int nu, const vec &x)
{
vec out(x.size());
for (int i=0; i<x.size(); i++)
out(i) = kn(nu, x(i));
return out;
}
} // namespace itpp
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