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NFFT
3.4.1
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NFFT
3.4.1
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data structure for an NNFFT (nonequispaced in time and frequency fast Fourier transform) plan with long double precision More...
#include <nfft3.h>
Data Fields | |
| NFFT_INT | N_total |
| Total number of Fourier coefficients. More... | |
| NFFT_INT | M_total |
| Total number of samples. More... | |
| fftwl_complex * | f_hat |
| Fourier coefficients. More... | |
| fftwl_complex * | f |
| Samples. More... | |
| void(* | mv_trafo )(void *) |
| Transform. More... | |
| void(* | mv_adjoint )(void *) |
| Adjoint transform. More... | |
| int | d |
| dimension, rank | |
| long double * | sigma |
| oversampling-factor | |
| long 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 | |
| long double * | b |
| shape parameters | |
| int | K |
| number of precomp. More... | |
| int | aN1_total |
| aN1_total=aN1[0]* ... More... | |
| nfftl_plan * | direct_plan |
| plan for the nfft | |
| unsigned | nnfft_flags |
| flags for precomputation, malloc | |
| int * | n |
| n=N1, for the window function | |
| long double * | x |
| nodes (in time/spatial domain) | |
| long double * | v |
| nodes (in fourier domain) | |
| long double * | c_phi_inv |
| precomputed data, matrix D | |
| long 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 | |
| fftwl_complex * | F |
| long double * | spline_coeffs |
| input for de Boor algorithm, if B_SPLINE or SINC_2m is defined | |
data structure for an NNFFT (nonequispaced in time and frequency fast Fourier transform) plan with long double precision
| NFFT_INT nnfftl_plan::N_total |
1.8.6