data structure for an NFFT (nonequispaced fast Fourier transform) plan with long double precision More...

#include <nfft3.h>

Public Member Functions
	FFTW_MANGLE_LONG_DOUBLE (plan) my_fftw_plan1
	Forward FFTW plan.

	FFTW_MANGLE_LONG_DOUBLE (plan) my_fftw_plan2
	Backward FFTW plan.

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...

NFFT_INT	d
	Dimension (rank). More...

NFFT_INT *	N
	Multi-bandwidth. More...

long double *	sigma
	Oversampling factor. More...

NFFT_INT *	n
	Length of FFTW transforms. More...

NFFT_INT	n_total
	Combined total length of FFTW transforms. More...

NFFT_INT	m
	Cut-off parameter for window function. More...

long double *	b
	Shape parameter for window function.

NFFT_INT	K
	Number of equispaced samples of window function. More...

unsigned	flags
	Flags for precomputation, (de)allocation, and FFTW usage, default setting is PRE_PHI_HUT \| PRE_PSI \| MALLOC_X \| MALLOC_F_HAT \| MALLOC_F \| FFTW_INIT \| FFT_OUT_OF_PLACE.

unsigned	fftw_flags
	Flags for the FFTW, default is FFTW_ESTIMATE \| FFTW_DESTROY_INPUT.

long double *	x
	Nodes in time/spatial domain, size is long doubles.

long double	MEASURE_TIME_t [3]
	Measured time for each step if MEASURE_TIME is set.

long double **	c_phi_inv
	Precomputed data for the diagonal matrix , size \ is $N_0+\dots+N_{d-1}$ doubles.

long double *	psi
	Precomputed data for the sparse matrix , size depends on precomputation scheme.

NFFT_INT *	psi_index_g
	Indices in source/target vector for PRE_FULL_PSI.

NFFT_INT *	psi_index_f
	Indices in source/target vector for PRE_FULL_PSI.

fftwl_complex *	g
	Oversampled vector of samples, size is n_total double complex.

fftwl_complex *	g_hat
	Zero-padded vector of Fourier coefficients, size is n_total fftw_complex.

fftwl_complex *	g1
	Input of fftw.

fftwl_complex *	g2
	Output of fftw.

long double *	spline_coeffs
	Input for de Boor algorithm if B_SPLINE or SINC_POWER is defined.

NFFT_INT *	index_x
	Index array for nodes x used when flag NFFT_SORT_NODES is set. More...