NFFT 3.5.3alpha
kernels.h
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1/*
2 * Copyright (c) 2002, 2017 Jens Keiner, Stefan Kunis, Daniel Potts
3 *
4 * This program is free software; you can redistribute it and/or modify it under
5 * the terms of the GNU General Public License as published by the Free Software
6 * Foundation; either version 2 of the License, or (at your option) any later
7 * version.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
12 * details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 51
16 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 */
18
22#ifndef KERNELS_H
23#define KERNELS_H
24
25#include "config.h"
26
27#ifdef HAVE_COMPLEX_H
28#include <complex.h>
29#endif
30
31#include "nfft3.h"
32#include "infft.h"
33
34#ifdef __cplusplus
35extern "C"
36{
37#endif /* __cplusplus */
38
44C gaussian(R x, int der, const R *param);
45C multiquadric(R x, int der, const R *param);
46C inverse_multiquadric(R x, int der, const R *param);
47C logarithm(R x, int der, const R *param);
48C thinplate_spline(R x, int der, const R *param);
49C one_over_square(R x, int der, const R *param);
50C one_over_modulus(R x, int der, const R *param);
51C one_over_x(R x, int der, const R *param);
52C inverse_multiquadric3(R x, int der, const R *param);
53C sinc_kernel(R x, int der, const R *param);
54C cosc(R x, int der, const R *param);
55C kcot(R x, int der, const R *param);
56C one_over_cube(R x, int der, const R *param);
57C log_sin(R x, int der, const R *param);
58C laplacian_rbf(R x, int der, const R *param);
59/* \} */
60
61#ifdef __cplusplus
62} /* extern "C" */
63#endif /* __cplusplus */
64
65#endif
66/* kernels.h */
C inverse_multiquadric(R x, int der, const R *param)
K(x)=1/sqrt(x^2+c^2)
Definition kernels.c:90
C logarithm(R x, int der, const R *param)
K(x)=log |x|.
Definition kernels.c:116
C multiquadric(R x, int der, const R *param)
K(x)=sqrt(x^2+c^2)
Definition kernels.c:64
C one_over_cube(R x, int der, const R *param)
K(x) = 1/x^3.
Definition kernels.c:374
C one_over_square(R x, int der, const R *param)
K(x) = 1/x^2.
Definition kernels.c:177
C sinc_kernel(R x, int der, const R *param)
K(x) = sin(cx)/x.
Definition kernels.c:287
C kcot(R x, int der, const R *param)
K(x) = cot(cx)
Definition kernels.c:346
C one_over_modulus(R x, int der, const R *param)
K(x) = 1/|x|.
Definition kernels.c:205
C thinplate_spline(R x, int der, const R *param)
K(x) = x^2 log |x|.
Definition kernels.c:149
C inverse_multiquadric3(R x, int der, const R *param)
K(x) = 1/sqrt(x^2+c^2)^3.
Definition kernels.c:261
C gaussian(R x, int der, const R *param)
K(x)=exp(-x^2/c^2)
Definition kernels.c:38
C one_over_x(R x, int der, const R *param)
K(x) = 1/x.
Definition kernels.c:233
C cosc(R x, int der, const R *param)
K(x) = cos(cx)/x.
Definition kernels.c:314
C log_sin(R x, int der, const R *param)
K(x) = log(|sin(cx)|)
Definition kernels.c:402
C laplacian_rbf(R x, int der, const R *param)
K(x) = exp(-|x|/c)
Definition kernels.c:417
Internal header file for auxiliary definitions and functions.
Header file for the nfft3 library.