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nnfft_plan Struct Reference
[NNFFT - Nonequispaced in time and frequency FFT]

Structure for a transform plan. More...

#include <nfft3.h>


Data Fields

int N_total
 Total number of Fourier \ coefficients.
int M_total
 Total number of samples.
fftw_complex * f_hat
 Vector of Fourier coefficients, \ size is N_total float_types.
fftw_complex * f
 Vector of samples, \ size is M_total float types.
void(* mv_trafo )(void *)
 Pointer to the own transform.
void(* mv_adjoint )(void *)
 Pointer to the own adjoint.
int d
 dimension, rank
double * sigma
 oversampling-factor
double * a
 1 + 2*m/N1
int * N
 cut-off-frequencies
int * N1
 sigma*N
int * aN1
 sigma*a*N
int m
 cut-off parameter in time-domain
double * b
 shape parameters
int K
 number of precomp.
int aN1_total
 aN1_total=aN1[0]* .
nfft_plandirect_plan
 plan for the nfft
unsigned nnfft_flags
 flags for precomputation, malloc
int * n
 n=N1, for the window function
double * x
 nodes (in time/spatial domain)
double * v
 nodes (in fourier domain)
double * c_phi_inv
 precomputed data, matrix D
double * 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
fftw_complex * F
double * spline_coeffs
 input for de Boor algorithm, if B_SPLINE or SINC_2m is defined


Detailed Description

Structure for a transform plan.

Definition at line 1034 of file nfft3.h.


Field Documentation

number of precomp.

uniform psi

Definition at line 1050 of file nfft3.h.

Referenced by nnfft_precompute_lin_psi().

aN1_total=aN1[0]* .

.. *aN1[d-1]

Definition at line 1052 of file nfft3.h.


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

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