fastsum.h File Reference

Header file for the fast NFFT-based summation algorithm. More...

#include "config.h"
#include "nfft3util.h"
#include "nfft3.h"

Go to the source code of this file.

Data Structures
struct	fastsum_plan_
	plan for fast summation algorithm More...

Macros
#define	NF_KUB
	Include header for C99 complex datatype.
#define	EXACT_NEARFIELD   (1U<< 0)
	Constant symbols.
#define	NEARFIELD_BOXES   (1U<< 1)

Typedefs
typedef double _Complex(*	kernel )(double, int, const double *)
typedef struct fastsum_plan_	fastsum_plan
	plan for fast summation algorithm

Functions
void	fastsum_init_guru (fastsum_plan *ths, int d, int N_total, int M_total, kernel k, double *param, unsigned flags, int nn, int m, int p, double eps_I, double eps_B)
	initialization of fastsum plan
void	fastsum_finalize (fastsum_plan *ths)
	finalization of fastsum plan
void	fastsum_exact (fastsum_plan *ths)
	direct computation of sums
void	fastsum_precompute (fastsum_plan *ths)
	precomputation for fastsum
void	fastsum_trafo (fastsum_plan *ths)
	fast NFFT-based summation
double _Complex	regkern (kernel k, double xx, int p, const double *param, double a, double b)
	regularized kernel with K_I arbitrary and K_B smooth to zero
double _Complex	kubintkern (const double x, const double _Complex *Add, const int Ad, const double a)
	cubic spline interpolation in near field with even kernels

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Detailed Description

Header file for the fast NFFT-based summation algorithm.

reference: M. Fenn, G. Steidl, Fast NFFT based summation of radial functions. Sampl. Theory Signal Image Process., 3, 1-28, 2004.

Author:

Markus Fenn

Date:

2003-2006

Definition in file fastsum.h.