ssht_test.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "ssht/ssht.h"

Include dependency graph for ssht_test.c:

Macros
#define	NREPEAT   5
#define	MAX(a, b)   ((a) > (b) ? (a) : (b))

Functions
double	ran2_dp (int idum)
void	ssht_test_gen_flm_complex (complex double *flm, int L, int spin, int seed)
void	ssht_test_gen_flm_real (complex double *flm, int L, int seed)
void	ssht_test_gen_lb_flm_complex (complex double *flm, int L_zero, int L, int spin, int seed)
void	ssht_test_gen_lb_flm_real (complex double *flm, int L0, int L, int seed)
int	null_test (const complex double *X, int n)
int	nan_test (const complex double *X, int n)
int	main (int argc, char *argv[])

Detailed Description

Applies SSHT algorithms to perform inverse and forward spherical harmonic transforms (respectively) to check that the original signal is reconstructed exactly (to numerical precision). Test is performed on a random signal with harmonic coefficients uniformly sampled from (-1,1).

Usage: ssht_test B spin [B0], e.g. ssht_test 64 2 32

Author

Jason McEwen

Macro Definition Documentation

MAX

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

NREPEAT

#define NREPEAT   5

Function Documentation

main()

int main	(	int	argc,
		char *	argv[]
	)

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

Null and Nan Tests!

Harmonic Coefficients

Harmonic Coefficients

nan_test()

int nan_test	(	const complex double *	X,
		int	n
	)

Test for nan vector

Parameters

[in]	X	vector of complex double
[in]	n	length of X.

Return values

Y	returns int 1 if no nans, 0 if nan entires exist. i.e. 0 = fail, 1 = pass.

null_test()

int null_test	(	const complex double *	X,
		int	n
	)

Test for null vector

Parameters

[in]	X	vector of complex double
[in]	n	length of X.

Return values

Y	returns int 0 if all zeros, 1 if non-zero i.e. 0 = fail, 1 = pass.

ran2_dp()

double ran2_dp

(

int

idum

)

Generate uniform deviate in range [0,1) given seed. (Using double precision.)

Note

Uniform deviate (Num rec 1992, chap 7.1), original routine said to be 'perfect'.

Parameters

[in]

idum

Seed.

Return values

ran_dp

Generated uniform deviate.

Author

Jason McEwen

ssht_test_gen_flm_complex()

void ssht_test_gen_flm_complex	(	complex double *	flm,
		int	L,
		int	spin,
		int	seed
	)

Generate random spherical harmonic coefficients of a complex signal.

Parameters

[out]	flm	Random spherical harmonic coefficients generated.
[in]	L	Harmonic band-limit.
[in]	spin	Spin number.
[in]	seed	Integer seed required for random number generator.

Return values

none

Author

Jason McEwen

ssht_test_gen_flm_real()

void ssht_test_gen_flm_real	(	complex double *	flm,
		int	L,
		int	seed
	)

Generate random spherical harmonic coefficients of a real spin=0 signal.

Parameters

[out]	flm	Random spherical harmonic coefficients generated.
[in]	L	Harmonic band-limit.
[in]	seed	Integer seed required for random number generator.

Return values

none

Author

Jason McEwen

ssht_test_gen_lb_flm_complex()

void ssht_test_gen_lb_flm_complex	(	complex double *	flm,
		int	L0,
		int	L,
		int	spin,
		int	seed
	)

Generate random spherical harmonic coefficients of a complex signal with lower band-limit.

Parameters

[out]	flm	Random spherical harmonic coefficients generated.
[in]	L0	Lower harmonic band-limit.
[in]	L	Upper harmonic band-limit.
[in]	spin	Spin number.
[in]	seed	Integer seed required for random number generator.

Return values

none

Author

Jason McEwen

ssht_test_gen_lb_flm_real()

void ssht_test_gen_lb_flm_real	(	complex double *	flm,
		int	L0,
		int	L,
		int	seed
	)

Generate random spherical harmonic coefficients of a real spin=0 signal with lower band-limit.

Parameters

[out]	flm	Random spherical harmonic coefficients generated.
[in]	L0	Lower harmonic band-limit.
[in]	L	Upper harmonic band-limit.
[in]	seed	Integer seed required for random number generator.

Return values

none

Author

Jason McEwen