diff options
Diffstat (limited to 'gsl-1.9/vector/minmax_source.c')
| -rw-r--r-- | gsl-1.9/vector/minmax_source.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/gsl-1.9/vector/minmax_source.c b/gsl-1.9/vector/minmax_source.c new file mode 100644 index 0000000..4fbd86e --- /dev/null +++ b/gsl-1.9/vector/minmax_source.c @@ -0,0 +1,217 @@ +/* vector/minmax_source.c + * + * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman, Brian Gough + * + * 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. + */ + +BASE +FUNCTION(gsl_vector,max) (const TYPE(gsl_vector) * v) +{ + /* finds the largest element of a vector */ + + const size_t N = v->size ; + const size_t stride = v->stride ; + + BASE max = v->data[0 * stride]; + size_t i; + + for (i = 0; i < N; i++) + { + BASE x = v->data[i*stride]; + if (x > max) + max = x; +#ifdef FP + if (isnan (x)) + return x; +#endif + } + + return max; +} + +BASE +FUNCTION(gsl_vector,min) (const TYPE(gsl_vector) * v) +{ + /* finds the smallest element of a vector */ + + const size_t N = v->size ; + const size_t stride = v->stride ; + + BASE min = v->data[0 * stride]; + size_t i; + + for (i = 0; i < N; i++) + { + BASE x = v->data[i*stride]; + if (x < min) + min = x; +#ifdef FP + if (isnan (x)) + return x; +#endif + } + + return min; +} + +void +FUNCTION(gsl_vector,minmax) (const TYPE(gsl_vector) * v, + BASE * min_out, + BASE * max_out) +{ + /* finds the smallest and largest elements of a vector */ + + const size_t N = v->size ; + const size_t stride = v->stride ; + + BASE max = v->data[0 * stride]; + BASE min = v->data[0 * stride]; + + size_t i; + + for (i = 0; i < N; i++) + { + BASE x = v->data[i*stride]; + if (x < min) + { + min = x; + } + if (x > max) + { + max = x; + } +#ifdef FP + if (isnan (x)) + { + min = x; + max = x; + break; + } +#endif + } + + *min_out = min; + *max_out = max; +} + + +size_t +FUNCTION(gsl_vector,max_index) (const TYPE(gsl_vector) * v) +{ + /* finds the largest element of a vector */ + + const size_t N = v->size ; + const size_t stride = v->stride ; + + BASE max = v->data[0 * stride]; + size_t imax = 0; + size_t i; + + for (i = 0; i < N; i++) + { + BASE x = v->data[i*stride]; + if (x > max) + { + max = x; + imax = i; + } +#ifdef FP + if (isnan (x)) + { + return i; + } +#endif + } + + return imax; +} + +size_t +FUNCTION(gsl_vector,min_index) (const TYPE(gsl_vector) * v) +{ + /* finds the smallest element of a vector */ + + const size_t N = v->size ; + const size_t stride = v->stride ; + + BASE min = v->data[0 * stride]; + size_t imin = 0; + size_t i; + + for (i = 0; i < N; i++) + { + BASE x = v->data[i*stride]; + if (x < min) + { + min = x; + imin = i; + } +#ifdef FP + if (isnan (x)) + { + return i; + } +#endif + } + + return imin; +} + + +void +FUNCTION(gsl_vector,minmax_index) (const TYPE(gsl_vector) * v, + size_t * imin_out, + size_t * imax_out) +{ + /* finds the smallest and largest elements of a vector */ + + const size_t N = v->size ; + const size_t stride = v->stride ; + + size_t imin = 0, imax = 0; + BASE max = v->data[0 * stride]; + BASE min = v->data[0 * stride]; + + size_t i; + + for (i = 0; i < N; i++) + { + BASE x = v->data[i*stride]; + if (x < min) + { + min = x; + imin = i; + } + if (x > max) + { + max = x; + imax = i; + } +#ifdef FP + if (isnan (x)) + { + imin = i; + imax = i; + break; + } +#endif + } + + *imin_out = imin; + *imax_out = imax; +} + + |