nfct_plan Struct Reference

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

#include <nfft3.h>

Public Member Functions
	FFTW_MANGLE_DOUBLE (plan) my_fftw_r2r_plan
	fftw_plan
	FFTW_MANGLE_DOUBLE (r2r_kind) *r2r_kind
	r2r transform type (DCT-I)

Data Fields
NFFT_INT	N_total
	Total number of Fourier coefficients.
NFFT_INT	M_total
	Total number of samples.
double *	f_hat
	Fourier coefficients.
double *	f
	Samples.
void(*	mv_trafo )(void *)
	Transform.
void(*	mv_adjoint )(void *)
	Adjoint transform.
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.
double *	sigma
	oversampling-factor
NFFT_INT	m
	cut-off parameter in time-domain
double *	b
	shape parameters
NFFT_INT	K
	Number of equispaced samples of window function.
unsigned	flags
	flags for precomputation, malloc
unsigned	fftw_flags
	flags for the fftw
double *	x
	nodes (in time/spatial domain)
double	MEASURE_TIME_t [3]
	measured time for each step
double **	c_phi_inv
	precomputed data, matrix D
double *	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
double *	g
double *	g_hat
double *	g1
	input of fftw
double *	g2
	output of fftw
double *	spline_coeffs
	input for de Boor algorithm, if B_SPLINE or SINC_2m is defined

Detailed Description

data structure for an NFCT (nonequispaced fast cosine transform) plan with double precision

NFCT transform plan

Definition at line 278 of file nfft3.h.

Field Documentation

N_total

NFFT_INT nfct_plan::N_total

Total number of Fourier coefficients.

Definition at line 278 of file nfft3.h.

M_total

NFFT_INT nfct_plan::M_total

Total number of samples.

Definition at line 278 of file nfft3.h.

f_hat

double* nfct_plan::f_hat

Fourier coefficients.

Definition at line 278 of file nfft3.h.

f

double* nfct_plan::f

Samples.

Definition at line 278 of file nfft3.h.

mv_trafo

void(* nfct_plan::mv_trafo) (void *)

Transform.

Definition at line 278 of file nfft3.h.

mv_adjoint

void(* nfct_plan::mv_adjoint) (void *)

Adjoint transform.

Definition at line 278 of file nfft3.h.

d

NFFT_INT nfct_plan::d

dimension, rank

Definition at line 278 of file nfft3.h.

N

NFFT_INT* nfct_plan::N

cut-off-frequencies (kernel)

Definition at line 278 of file nfft3.h.

n

NFFT_INT* nfct_plan::n

length of DCT-I

Definition at line 278 of file nfft3.h.

n_total

NFFT_INT nfct_plan::n_total

Combined total length of FFTW transforms.

Definition at line 278 of file nfft3.h.

sigma

double* nfct_plan::sigma

oversampling-factor

Definition at line 278 of file nfft3.h.

m

NFFT_INT nfct_plan::m

cut-off parameter in time-domain

Definition at line 278 of file nfft3.h.

b

double* nfct_plan::b

shape parameters

Definition at line 278 of file nfft3.h.

K

NFFT_INT nfct_plan::K

Number of equispaced samples of window function.

Used for flag PRE_LIN_PSI.

Definition at line 278 of file nfft3.h.

flags

unsigned nfct_plan::flags

flags for precomputation, malloc

Definition at line 278 of file nfft3.h.

fftw_flags

unsigned nfct_plan::fftw_flags

flags for the fftw

Definition at line 278 of file nfft3.h.

x

double* nfct_plan::x

nodes (in time/spatial domain)

Definition at line 278 of file nfft3.h.

MEASURE_TIME_t

double nfct_plan::MEASURE_TIME_t[3]

measured time for each step

Definition at line 278 of file nfft3.h.

c_phi_inv

double** nfct_plan::c_phi_inv

precomputed data, matrix D

Definition at line 278 of file nfft3.h.

psi

double* nfct_plan::psi

precomputed data, matrix B

Definition at line 278 of file nfft3.h.

size_psi

NFFT_INT nfct_plan::size_psi

only for thin B

Definition at line 278 of file nfft3.h.

psi_index_g

NFFT_INT* nfct_plan::psi_index_g

only for thin B

Definition at line 278 of file nfft3.h.

psi_index_f

NFFT_INT* nfct_plan::psi_index_f

only for thin B

Definition at line 278 of file nfft3.h.

g

double* nfct_plan::g

Definition at line 278 of file nfft3.h.

g_hat

double* nfct_plan::g_hat

Definition at line 278 of file nfft3.h.

g1

double* nfct_plan::g1

input of fftw

Definition at line 278 of file nfft3.h.

g2

double* nfct_plan::g2

output of fftw

Definition at line 278 of file nfft3.h.

spline_coeffs

double* nfct_plan::spline_coeffs

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

Definition at line 278 of file nfft3.h.

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The documentation for this struct was generated from the following file:

• nfft3.h