net.maizegenetics.stats.math

Class GammaFunction

net.maizegenetics.stats.math.GammaFunction

public class GammaFunction

gamma function

Method Detail

lnGamma

public static double lnGamma(double alpha)

log Gamma function: ln(gamma(alpha)) for alpha>0, accurate to 10 decimal places

Parameters:

alpha - argument

incompleteGammaQ

public static double incompleteGammaQ(double a,
                                      double x)

Incomplete Gamma function Q(a,x) (a cleanroom implementation of Numerical Recipes gammq(a,x); in Mathematica this function is called GammaRegularized)

Parameters:

a - parameter

x - argument

Returns:

org.jetbrains.dokka.NodeRenderContent@4337df6f: function value

incompleteGammaP

public static double incompleteGammaP(double a,
                                      double x)

Incomplete Gamma function P(a,x) = 1-Q(a,x) (a cleanroom implementation of Numerical Recipes gammp(a,x); in Mathematica this function is 1-GammaRegularized)

Parameters:

a - parameter

x - argument

Returns:

org.jetbrains.dokka.NodeRenderContent@3a4aa785: function value

incompleteGammaP

public static double incompleteGammaP(double a,
                                      double x,
                                      double lnGammaA)

Incomplete Gamma function P(a,x) = 1-Q(a,x) (a cleanroom implementation of Numerical Recipes gammp(a,x); in Mathematica this function is 1-GammaRegularized)

Parameters:

a - parameter

x - argument

Returns:

org.jetbrains.dokka.NodeRenderContent@6e357841: function value