/usr/include/gwyddion/libgwyddion/gwymath.h is in libgwyddion20-dev 2.44-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* @(#) $Id: gwymath.h 17899 2015-12-24 23:09:59Z yeti-dn $
* Copyright (C) 2003,2004 David Necas (Yeti), Petr Klapetek.
* E-mail: yeti@gwyddion.net, klapetek@gwyddion.net.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GWY_MATH_H__
#define __GWY_MATH_H__
#include <glib.h>
#include <libgwyddion/gwymacros.h>
#include <math.h>
/* TODO: Remove in 3.0. This is kept included only because we have
* traditionally defined unprefix cbrt() et al. if the platform did not
* provide it. */
#include <libgwyddion/gwymathfallback.h>
G_BEGIN_DECLS
#ifndef GWY_DISABLE_DEPRECATED
#define ROUND(x) ((gint)floor((x) + 0.5))
#endif
#define GWY_ROUND(x) ((gint)floor((x) + 0.5))
#define GWY_SQRT3 1.73205080756887729352744634150587236694280525381038
#define GWY_SQRT_PI 1.77245385090551602729816748334114518279754945612237
gdouble gwy_math_humanize_numbers (gdouble unit,
gdouble maximum,
gint *precision);
gboolean gwy_math_is_in_polygon (gdouble x,
gdouble y,
const gdouble* poly,
guint n);
gint gwy_math_find_nearest_line (gdouble x,
gdouble y,
gdouble *d2min,
gint n,
const gdouble *coords,
const gdouble *metric);
gint gwy_math_find_nearest_point (gdouble x,
gdouble y,
gdouble *d2min,
gint n,
const gdouble *coords,
const gdouble *metric);
gdouble* gwy_math_lin_solve (gint n,
const gdouble *matrix,
const gdouble *rhs,
gdouble *result);
gdouble* gwy_math_lin_solve_rewrite (gint n,
gdouble *matrix,
gdouble *rhs,
gdouble *result);
gboolean gwy_math_tridiag_solve_rewrite(gint n,
gdouble *d,
const gdouble *a,
const gdouble *b,
gdouble *rhs);
gdouble* gwy_math_fit_polynom (gint ndata,
const gdouble *xdata,
const gdouble *ydata,
gint n,
gdouble *coeffs);
gboolean gwy_math_choleski_decompose (gint n,
gdouble *matrix);
void gwy_math_choleski_solve (gint n,
const gdouble *decomp,
gdouble *rhs);
guint gwy_math_curvature (const gdouble *coeffs,
gdouble *kappa1,
gdouble *kappa2,
gdouble *phi1,
gdouble *phi2,
gdouble *xc,
gdouble *yc,
gdouble *zc);
gboolean gwy_math_refine_maximum (const gdouble *z,
gdouble *x,
gdouble *y);
gdouble gwy_math_median (gsize n,
gdouble *array);
void gwy_math_sort (gsize n,
gdouble *array);
gdouble gwy_math_median_uncertainty (gsize n,
gdouble *array,
gdouble *uarray);
gdouble gwy_xlnx_int (guint x) G_GNUC_CONST;
G_END_DECLS
#endif /* __GWY_MATH_H__ */
/* vim: set cin et ts=4 sw=4 cino=>1s,e0,n0,f0,{0,}0,^0,\:1s,=0,g1s,h0,t0,+1s,c3,(0,u0 : */
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