3 * Copyright (C) 2004 Free Software Foundation, Inc.
4 * Written by Jason H. Stover.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
23 #include <gsl/gsl_math.h>
24 #include <gsl/gsl_errno.h>
25 #include <gsl/gsl_cdf.h>
26 #include "gsl-extras.h"
29 * Pr(X <= n) for a negative binomial random variable X, i.e.,
30 * the probability of n or fewer failuers before success k.
33 gslextras_cdf_negative_binomial_P(const long n, const long k, const double p)
39 if(p > 1.0 || p < 0.0)
41 GSLEXTRAS_CDF_ERROR("p < 0 or p > 1",GSL_EDOM);
45 GSLEXTRAS_CDF_ERROR ("k < 0",GSL_EDOM);
55 P = gsl_cdf_beta_P(p, a, b);
64 gslextras_cdf_negative_binomial_Q(const long n, const long k, const double p)
70 if(p > 1.0 || p < 0.0)
72 GSLEXTRAS_CDF_ERROR("p < 0 or p > 1",GSL_EDOM);
76 GSLEXTRAS_CDF_ERROR ("k < 0",GSL_EDOM);
86 P = gsl_cdf_beta_Q(p, a, b);