src/Statistics/distributions.cpp File Reference

Helper functions for the Distribution class. More...

#include "distributions.h"
#include <cmath>
#include <iostream>

Defines

#define PI 3.14159265358979323846

Functions

static double inc_gamma (double a, double x)

The lower incomplete gamma function for integers and half integers.

static double ierf (double a)

Detailed Description

Helper functions for the Distribution class.

Various hypothesis tests.

Define Documentation

#define PI 3.14159265358979323846

Function Documentation

static double ierf ( double a ) [static]

static double inc_gamma	(	double	a,
		double	x
	)			`[static]`

The lower incomplete gamma function for integers and half integers.

Parameters:

	a	:The power in $\gamma(a,x)$
	x	:The limit x in $\gamma(a,x)$

This implementation uses the recursive definition, $\gamma(a,x)=(a-1)\gamma(a-1,x)-x^{a-1} e^{-x}$ . Large numbers are avoided by doing some computation in log space.


Defines
#define	PI 3.14159265358979323846
Functions
static double	inc_gamma (double a, double x)
	The lower incomplete gamma function for integers and half integers.
static double	ierf (double a)