data structure for an NNFFT (nonequispaced in time and frequency fast Fourier transform) plan with float precision More...

#include <nfft3.h>

Collaboration diagram for nnfftf_plan:

Data Fields
NFFT_INT	N_total
	Total number of Fourier coefficients. More...

NFFT_INT	M_total
	Total number of samples. More...

fftwf_complex *	f_hat
	Fourier coefficients. More...

fftwf_complex *	f
	Samples. More...

void(*	mv_trafo )(void *)
	Transform. More...

void(*	mv_adjoint )(void *)
	Adjoint transform. More...

int	d
	dimension, rank

float *	sigma
	oversampling-factor

float *	a
	1 + 2*m/N1

int *	N
	cut-off-frequencies

int *	N1
	sigma*N

int *	aN1
	sigmaaN

int	m
	cut-off parameter in time-domain

float *	b
	shape parameters

int	K
	number of precomp. More...

int	aN1_total
	aN1_total=aN1[0]* ... More...

nfftf_plan *	direct_plan
	plan for the nfft

unsigned	nnfft_flags
	flags for precomputation, malloc

int *	n
	n=N1, for the window function

float *	x
	nodes (in time/spatial domain)

float *	v
	nodes (in fourier domain)

float *	c_phi_inv
	precomputed data, matrix D

float *	psi
	precomputed data, matrix B

int	size_psi
	only for thin B

int *	psi_index_g
	only for thin B

int *	psi_index_f
	only for thin B

fftwf_complex *	F

float *	spline_coeffs
	input for de Boor algorithm, if B_SPLINE or SINC_2m is defined

Detailed Description

data structure for an NNFFT (nonequispaced in time and frequency fast Fourier transform) plan with float precision