NFFT  3.3.2
Public Member Functions | Data Fields
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

Definition at line 269 of file nfft3.h.


Field Documentation

Total number of Fourier coefficients.

Definition at line 269 of file nfft3.h.

Total number of samples.

Definition at line 269 of file nfft3.h.

Fourier coefficients.

Definition at line 269 of file nfft3.h.

double* nfct_plan::f

Samples.

Definition at line 269 of file nfft3.h.

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

Transform.

Definition at line 269 of file nfft3.h.

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

Adjoint transform.

Definition at line 269 of file nfft3.h.

Combined total length of FFTW transforms.

Definition at line 269 of file nfft3.h.

NFFT_INT nfct_plan::K

Number of equispaced samples of window function.

Used for flag PRE_LIN_PSI.

Definition at line 269 of file nfft3.h.


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