gammaFunc.c File Reference

#include "gammaTable.h"
#include "gammaFunc.h"
#include "debug.h"
#include "reset.h"
#include <math.h>

Go to the source code of this file.

Macros
#define	LNPI_2   M_LNPI / 2
	Ln of PI/2. More...

Functions
static double	evalLogGamma (int n)
	Calculates Ln (gamma(n)). More...
static double	evalLogGamma2 (int n)
	Calculates Ln (gamma(n + 1/2)). More...
double	kt (statistics_t stats)
	Calculates the Krichevsky-Trofimov probability assignment. More...
double	nodeCost (statistics_t stats)
	Calculates the cost of a node. More...
double	escapeCost (statistics_t stats, Uint *distinct)
	Calculates the cost of escapes in a node. More...
double	log2Alpha ()
	Returns the log2 of the alphabet size. More...
double	hAlpha ()
	Returns the binary entropy of 1/alphasize. More...

Variables
static double	alphasizeLog = 0
	Log2 of the alphabet size. More...
static double	alphaEntropy = 0
	Binary entropy of 1/alphasize. More...

Macro Definition Documentation

#define LNPI_2   M_LNPI / 2

Ln of PI/2.

Definition at line 36 of file gammaFunc.c.

Function Documentation

double escapeCost	(	statistics_t	stats,
		Uint *	distinct
	)

Calculates the cost of escapes in a node.

Parameters

[in]

stats

The statistics needed to calculate the probability assignment.

Returns

KT probability assignment.

Definition at line 143 of file gammaFunc.c.

static double evalLogGamma ( int  n )

static

Calculates Ln (gamma(n)).

Parameters

[in]

n

the argument.

Returns

Ln (gamma(n)).

Definition at line 49 of file gammaFunc.c.

static double evalLogGamma2 ( int  n )

static

Calculates Ln (gamma(n + 1/2)).

Parameters

[in]

n

the argument.

Returns

Ln (gamma(n + 1/2)).

Definition at line 73 of file gammaFunc.c.

double hAlpha

(

)

Returns the binary entropy of 1/alphasize.

Returns

binary entropy of 1/alphasize.

Definition at line 171 of file gammaFunc.c.

double kt

(

statistics_t

stats

)

Calculates the Krichevsky-Trofimov probability assignment.

Parameters

[in]

stats

The statistics needed to calculate the probability assignment.

Returns

KT probability assignment.

Definition at line 96 of file gammaFunc.c.

double log2Alpha

(

)

Returns the log2 of the alphabet size.

Returns

log2 of the alphabet size.

Definition at line 160 of file gammaFunc.c.

double nodeCost

(

statistics_t

stats

)

Calculates the cost of a node.

Parameters

[in]

stats

The statistics needed to calculate the probability assignment.

Returns

KT probability assignment.

Definition at line 123 of file gammaFunc.c.

Variable Documentation

double alphaEntropy = 0

static

Binary entropy of 1/alphasize.

Definition at line 42 of file gammaFunc.c.

double alphasizeLog = 0

static

Log2 of the alphabet size.

Definition at line 39 of file gammaFunc.c.