utilities.h File Reference

#include <complex.h>

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Functions
double	ran2_dp (int idum)
void	gen_flm_complex (complex double *flm, int L, int spin, int seed)
void	gen_flm_real (complex double *flm, int L, int seed)
void	gen_lb_flm_complex (complex double *flm, int L_zero, int L, int spin, int seed)
void	gen_lb_flm_real (complex double *flm, int L0, int L, int seed)
int	max (int a, int b)

Function Documentation

gen_flm_complex()

void 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

gen_flm_real()

void 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

gen_lb_flm_complex()

void 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

gen_lb_flm_real()

void 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

max()

int max	(	int	a,
		int	b
	)

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