| /* bspline/gsl_bspline.h |
| * |
| * Copyright (C) 2006 Patrick Alken |
| * |
| * 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 __GSL_BSPLINE_H__ |
| #define __GSL_BSPLINE_H__ |
| |
| #include <stdlib.h> |
| #include <gsl/gsl_math.h> |
| #include <gsl/gsl_vector.h> |
| |
| #undef __BEGIN_DECLS |
| #undef __END_DECLS |
| #ifdef __cplusplus |
| # define __BEGIN_DECLS extern "C" { |
| # define __END_DECLS } |
| #else |
| # define __BEGIN_DECLS /* empty */ |
| # define __END_DECLS /* empty */ |
| #endif |
| |
| __BEGIN_DECLS |
| |
| typedef struct |
| { |
| size_t k; /* spline order */ |
| size_t km1; /* k - 1 (polynomial order) */ |
| size_t l; /* number of polynomial pieces on interval */ |
| size_t nbreak; /* number of breakpoints (l + 1) */ |
| size_t n; /* number of bspline basis functions (l + k - 1) */ |
| |
| gsl_vector *knots; /* knots vector */ |
| gsl_vector *deltal; /* left delta */ |
| gsl_vector *deltar; /* right delta */ |
| gsl_vector *B; /* temporary spline results */ |
| } gsl_bspline_workspace; |
| |
| gsl_bspline_workspace * |
| gsl_bspline_alloc(const size_t k, const size_t nbreak); |
| |
| void gsl_bspline_free(gsl_bspline_workspace *w); |
| |
| size_t gsl_bspline_ncoeffs (gsl_bspline_workspace * w); |
| size_t gsl_bspline_order (gsl_bspline_workspace * w); |
| size_t gsl_bspline_nbreak (gsl_bspline_workspace * w); |
| double gsl_bspline_breakpoint (size_t i, gsl_bspline_workspace * w); |
| |
| int |
| gsl_bspline_knots(const gsl_vector *breakpts, gsl_bspline_workspace *w); |
| |
| int gsl_bspline_knots_uniform(const double a, const double b, |
| gsl_bspline_workspace *w); |
| |
| int |
| gsl_bspline_eval(const double x, gsl_vector *B, |
| gsl_bspline_workspace *w); |
| |
| __END_DECLS |
| |
| #endif /* __GSL_BSPLINE_H__ */ |