3.0 API Reference

mpolar_fft_test.c File Reference

NFFT-based polar FFT and inverse on modified polar grid. More...

#include <math.h>
#include <stdlib.h>
#include "util.h"
#include "nfft3.h"

Go to the source code of this file.

Functions

int mpolar_grid (int T, int R, double *x, double *w)

Generates the points $x_{t,j}$ with weights $w_{t,j}$ for the modified polar grid with $T$ angles and $R$ offsets.

int mpolar_dft (fftw_complex *f_hat, int NN, fftw_complex *f, int T, int R, int m)

discrete mpolar FFT

int mpolar_fft (fftw_complex *f_hat, int NN, fftw_complex *f, int T, int R, int m)

NFFT-based mpolar FFT.

int inverse_mpolar_fft (fftw_complex *f, int T, int R, fftw_complex *f_hat, int NN, int max_i, int m)

inverse NFFT-based mpolar FFT

int comparison_fft (FILE *fp, int N, int T, int R)

Comparison of the FFTW, mpolar FFT, and inverse mpolar FFT.

int main (int argc, char **argv)

test program for various parameters

Variables

double GLOBAL_elapsed_time

Detailed Description

NFFT-based polar FFT and inverse on modified polar grid.

Computes the NFFT-based polar FFT and its inverse on a modified polar grid for various parameters.

Author:: Markus Fenn

Date:: 2006

Definition in file mpolar_fft_test.c.

Generated on 1 Nov 2006 by Doxygen 1.4.4


Functions
int	mpolar_grid (int T, int R, double x, double w)
	Generates the points $x_{t,j}$ with weights $w_{t,j}$ for the modified polar grid with angles and offsets.
int	mpolar_dft (fftw_complex f_hat, int NN, fftw_complex f, int T, int R, int m)
	discrete mpolar FFT
int	mpolar_fft (fftw_complex f_hat, int NN, fftw_complex f, int T, int R, int m)
	NFFT-based mpolar FFT.
int	inverse_mpolar_fft (fftw_complex f, int T, int R, fftw_complex f_hat, int NN, int max_i, int m)
	inverse NFFT-based mpolar FFT
int	comparison_fft (FILE *fp, int N, int T, int R)
	Comparison of the FFTW, mpolar FFT, and inverse mpolar FFT.
int	main (int argc, char **argv)
	test program for various parameters
Variables
double	GLOBAL_elapsed_time