random_chisquared.h

// Description: Chi-squared-distributed random numbers

#ifndef PASTELSYS_RANDOM_CHISQUARED_H
#define PASTELSYS_RANDOM_CHISQUARED_H

#include "pastel/sys/mytypes.h"

namespace Pastel
{

    //! Returns a Chi-squared distributed random variable.
    /*!
   Preconditions:
   k > 0
   */
    template <typename Real>
    Real randomChiSquared(integer k);

    //! Probability density function of the Chi-squared distribution.
    /*!
   Preconditions:
   k > 0
   */
    template <typename Real>
    Real chiSquaredPdf(
        const NoDeduction<Real>& x,
        integer k);

}

#include "pastel/sys/random/random_chisquared.hpp"

#endif