NFFT  3.3.2
simple_test.c
00001 /*
00002  * Copyright (c) 2002, 2016 Jens Keiner, Stefan Kunis, Daniel Potts
00003  *
00004  * This program is free software; you can redistribute it and/or modify it under
00005  * the terms of the GNU General Public License as published by the Free Software
00006  * Foundation; either version 2 of the License, or (at your option) any later
00007  * version.
00008  *
00009  * This program is distributed in the hope that it will be useful, but WITHOUT
00010  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00011  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
00012  * details.
00013  *
00014  * You should have received a copy of the GNU General Public License along with
00015  * this program; if not, write to the Free Software Foundation, Inc., 51
00016  * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00017  */
00018 
00019 #include <stdio.h>
00020 #include <math.h>
00021 #include <string.h>
00022 #include <stdlib.h>
00023 
00024 #define NFFT_PRECISION_DOUBLE
00025 
00026 #include "nfft3mp.h"
00027 
00028 static void simple_test_nfst_1d(void)
00029 {
00030   NFST(plan) p;
00031 
00032   const char *error_str;
00033 
00034   int N = 14;
00035   int M = 19;
00036 
00038   NFST(init_1d)(&p,N,M);
00039 
00041   NFFT(vrand_real)(p.x, p.M_total, NFFT_K(0.0), NFFT_K(0.5));
00042 
00044   if( p.flags & PRE_ONE_PSI)
00045     NFST(precompute_one_psi)(&p);
00046 
00048   NFFT(vrand_real)(p.f_hat, p.N_total, NFFT_K(0.0), NFFT_K(1.0));
00049   NFFT(vpr_double)(p.f_hat,p.N_total,"given Fourier coefficients, vector f_hat");
00050 
00052   error_str = NFST(check)(&p);
00053   if (error_str != 0)
00054   {
00055     printf("Error in nfst module: %s\n", error_str);
00056     return;
00057   }
00058 
00060   NFST(trafo_direct)(&p);
00061   NFFT(vpr_double)(p.f,p.M_total,"ndst, vector f");
00062 
00064   NFST(trafo)(&p);
00065   NFFT(vpr_double)(p.f,p.M_total,"nfst, vector f");
00066 
00068   NFST(adjoint_direct)(&p);
00069   NFFT(vpr_double)(p.f_hat,p.N_total,"adjoint ndst, vector f_hat");
00070 
00072   NFST(adjoint)(&p);
00073   NFFT(vpr_double)(p.f_hat,p.N_total,"adjoint nfst, vector f_hat");
00074 
00076   NFST(finalize)(&p);
00077 }
00078 
00079 int main(void)
00080 {
00081   printf("Computing one dimensional ndct, nfct, adjoint ndct, and adjoint nfct...\n\n");
00082   simple_test_nfst_1d();
00083   printf("\n\n");
00084 
00085   return EXIT_SUCCESS;
00086 }