3 * Copyright (C) 2004 Jason H. Stover.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22 #include <gsl/gsl_math.h>
23 #include <gsl/gsl_errno.h>
24 #include <gsl/gsl_cdf.h>
29 * Pr(X <= k) for a negative binomial random variable X, i.e.,
30 * the probability of k or fewer failuers before success n.
34 gsl_cdf_negative_binomial_P (const unsigned int k, const double p, const double n)
40 if (p > 1.0 || p < 0.0)
42 CDF_ERROR ("p < 0 or p > 1", GSL_EDOM);
47 CDF_ERROR ("n < 0", GSL_EDOM);
52 P = gsl_cdf_beta_P (p, a, b);
62 gsl_cdf_negative_binomial_Q (const unsigned int k, const double p, const double n)
68 if (p > 1.0 || p < 0.0)
70 CDF_ERROR ("p < 0 or p > 1", GSL_EDOM);
75 CDF_ERROR ("n < 0", GSL_EDOM);
80 Q = gsl_cdf_beta_Q (p, a, b);