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 GNU Scientific Library Reference Manual - Third Edition (v1.12) by M. Galassi, J. Davies, J. Theiler, B. Gough, G. Jungman, P. Alken, M. Booth, F. RossiPaperback (6"x9"), 592 pages, 60 figuresISBN 0954612078RRP £24.95 (\$39.95)

## 31.2 Functions

Function: gsl_dht * gsl_dht_alloc (size_t size)
This function allocates a Discrete Hankel transform object of size size.
Function: int gsl_dht_init (gsl_dht * t, double nu, double xmax)
This function initializes the transform t for the given values of nu and x.
Function: gsl_dht * gsl_dht_new (size_t size, double nu, double xmax)
This function allocates a Discrete Hankel transform object of size size and initializes it for the given values of nu and x.
Function: void gsl_dht_free (gsl_dht * t)
This function frees the transform t.
Function: int gsl_dht_apply (const gsl_dht * t, double * f_in, double * f_out)
This function applies the transform t to the array f_in whose size is equal to the size of the transform. The result is stored in the array f_out which must be of the same length.
Function: double gsl_dht_x_sample (const gsl_dht * t, int n)
This function returns the value of the n-th sample point in the unit interval, (j_{\nu,n+1}/j_{\nu,M}) X. These are the points where the function f(t) is assumed to be sampled.
Function: double gsl_dht_k_sample (const gsl_dht * t, int n)
This function returns the value of the n-th sample point in “k-space”, j_{\nu,n+1}/X.
 ISBN 0954612078 GNU Scientific Library Reference Manual - Third Edition (v1.12) See the print edition