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Data Structures | |
struct | nsfft_plan |
Structure for a NFFT plan. More... | |
Defines | |
#define | NSDFT (1U<< 12) |
If this flag is set, the member index_sparse_to_full is (de)allocated and initialised for the use in the routine nsdft_trafo and nsdft_adjoint. | |
Functions | |
void | nsdft_trafo (nsfft_plan *ths) |
Executes an NSDFT, computes for ![]()
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void | nsdft_adjoint (nsfft_plan *ths) |
Executes an adjoint NSFFT, computes for ![]()
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void | nsfft_trafo (nsfft_plan *ths) |
Executes an NSFFT, computes fast and approximate for ![]()
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void | nsfft_adjoint (nsfft_plan *ths) |
Executes an adjoint NSFFT, computes fast and approximate for ![]()
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void | nsfft_cp (nsfft_plan *ths, nfft_plan *ths_nfft) |
Copy coefficients from nsfft plan to a nfft plan. | |
void | nsfft_init_random_nodes_coeffs (nsfft_plan *ths) |
Initialisation of pseudo random nodes and coefficients. | |
void | nsfft_init (nsfft_plan *ths, int d, int J, int M, int m, unsigned flags) |
Initialisation of a transform plan. | |
void | nsfft_finalize (nsfft_plan *ths) |
Destroys a transform plan. |
#define NSDFT (1U<< 12) |
If this flag is set, the member index_sparse_to_full is (de)allocated and initialised for the use in the routine nsdft_trafo and nsdft_adjoint.
void nsdft_trafo | ( | nsfft_plan * | ths | ) |
Executes an NSDFT, computes for :
.
Definition at line 794 of file nsfft.c.
References nsfft_plan::d.
void nsdft_adjoint | ( | nsfft_plan * | ths | ) |
Executes an adjoint NSFFT, computes for :
.
Definition at line 854 of file nsfft.c.
References nsfft_plan::d.
void nsfft_trafo | ( | nsfft_plan * | ths | ) |
Executes an NSFFT, computes fast and approximate for :
.
Definition at line 1523 of file nsfft.c.
References nsfft_plan::d.
void nsfft_adjoint | ( | nsfft_plan * | ths | ) |
Executes an adjoint NSFFT, computes fast and approximate for :
.
Definition at line 1531 of file nsfft.c.
References nsfft_plan::d.
void nsfft_cp | ( | nsfft_plan * | ths, | |
nfft_plan * | ths_nfft | |||
) |
Copy coefficients from nsfft plan to a nfft plan.
Definition at line 587 of file nsfft.c.
References nsfft_plan::act_nfft_plan, nsfft_plan::d, nsfft_plan::f_hat, nfft_plan::f_hat, nsfft_plan::index_sparse_to_full, nsfft_plan::M_total, nsfft_plan::N_total, nfft_plan::N_total, and nfft_plan::x.
void nsfft_init_random_nodes_coeffs | ( | nsfft_plan * | ths | ) |
Initialisation of pseudo random nodes and coefficients.
Definition at line 705 of file nsfft.c.
References nsfft_plan::act_nfft_plan, nsfft_plan::d, nsfft_plan::f_hat, nsfft_plan::M_total, nsfft_plan::N_total, nfft_vrand_shifted_unit_double(), nfft_vrand_unit_complex(), nfft_plan::x, nsfft_plan::x_021, nsfft_plan::x_102, nsfft_plan::x_120, nsfft_plan::x_201, and nsfft_plan::x_transposed.
void nsfft_init | ( | nsfft_plan * | ths, | |
int | d, | |||
int | J, | |||
int | M, | |||
int | m, | |||
unsigned | flags | |||
) |
void nsfft_finalize | ( | nsfft_plan * | ths | ) |
Destroys a transform plan.
Definition at line 1863 of file nsfft.c.
References nsfft_plan::d.