data structure for an NFCT (nonequispaced fast cosine transform) plan with float precision More...

#include <nfft3.h>

Public Member Functions
	FFTW_MANGLE_FLOAT (plan) my_fftw_r2r_plan
	fftw_plan

	FFTW_MANGLE_FLOAT (r2r_kind)*r2r_kind
	r2r transform type (DCT-I)

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

NFFT_INT	M_total
	Total number of samples. More...

float *	f_hat
	Fourier coefficients. More...

float *	f
	Samples. More...

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

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

NFFT_INT	d
	dimension, rank

NFFT_INT *	N
	cut-off-frequencies (kernel)

NFFT_INT *	n
	length of DCT-I

NFFT_INT	n_total
	Combined total length of FFTW transforms. More...

float *	sigma
	oversampling-factor

NFFT_INT	m
	cut-off parameter in time-domain

float *	b
	shape parameters

NFFT_INT	K
	Number of equispaced samples of window function. More...

unsigned	flags
	flags for precomputation, malloc

unsigned	fftw_flags
	flags for the fftw

float *	x
	nodes (in time/spatial domain)

double	MEASURE_TIME_t [3]
	measured time for each step

float **	c_phi_inv
	precomputed data, matrix D

float *	psi
	precomputed data, matrix B

NFFT_INT	size_psi
	only for thin B

NFFT_INT *	psi_index_g
	only for thin B

NFFT_INT *	psi_index_f
	only for thin B

float *	g

float *	g_hat

float *	g1
	input of fftw

float *	g2
	output of fftw

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