s2let_math.h File Reference

#include <ssht/ssht.h>

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Macros
#define	PI   3.141592653589793238462643383279502884197
#define	MIN(a, b)   ((a) < (b) ? (a) : (b))
#define	MAX(a, b)   ((a) > (b) ? (a) : (b))
#define	ABS(a)   ((a) > (0.0) ? (a) : (-(a)))

Functions
double	s2let_math_kappa0_quadtrap_s2dw (double a, double b, int n, double B)
double	s2let_math_kappa0_quadtrap_needlet (double a, double b, int n)
double	s2let_math_spline_scalingfct (double x, double y)
double	ran2_dp (int idum)
double	maxerr_cplx (S2LET_COMPLEX(double) *a, S2LET_COMPLEX(double) *b, int size)
double	maxerr (double *a, double *b, int size)
unsigned long	binomial_coefficient (int n, int k, int exact)

Macro Definition Documentation

ABS

#define ABS

(

a

)

((a) > (0.0) ? (a) : (-(a)))

MAX

#define MAX	(		a,
			b
	)		((a) > (b) ? (a) : (b))

MIN

#define MIN	(		a,
			b
	)		((a) < (b) ? (a) : (b))

PI

#define PI   3.141592653589793238462643383279502884197

Function Documentation

binomial_coefficient()

unsigned long binomial_coefficient	(	int	n,
		int	k,
		int	exact
	)

Computes the binomial coefficient "n choose k".

Parameters

[in]	n	Number of elements to choose from
[in]	k	Number of elements to pick
[in]	exact	0 for approximate computation 1 for exact computation

Return values

Number

of possible subsets

exact implementation

maxerr()

double maxerr	(	double *	a,
		double *	b,
		int	size
	)

Max absolute error between two real arrays

maxerr_cplx()

double maxerr_cplx	(	S2LET_COMPLEX(double) *	a,
		S2LET_COMPLEX(double) *	b,
		int	size
	)

ran2_dp()

double ran2_dp

(

int

idum

)

Random number from seed (Numerical Recipes).

s2let_math_kappa0_quadtrap_needlet()

double s2let_math_kappa0_quadtrap_needlet	(	double	a,
		double	b,
		int	n
	)

Computes smooth "Schwartz" functions for needlets

s2let_math_kappa0_quadtrap_s2dw()

double s2let_math_kappa0_quadtrap_s2dw	(	double	a,
		double	b,
		int	n,
		double	B
	)

Computes smooth "Schwartz" functions for scale-discretised wavelets

s2let_math_spline_scalingfct()

double s2let_math_spline_scalingfct	(	double	x,
		double	y
	)

Computes spline scaling function