| /* |
| * Mathlib : A C Library of Special Functions |
| * Copyright (C) 1998 Ross Ihaka |
| * Copyright (C) 2000 The R Core Team |
| * |
| * 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, a copy is available at |
| * https://www.R-project.org/Licenses/ |
| * |
| * SYNOPSIS |
| * |
| * #include "Rnorm.h" |
| * double rnorm(double mu, double sigma); |
| * |
| * DESCRIPTION |
| * |
| * Random variates from the normal distribution. |
| * |
| */ |
| |
| #include "nmath.h" |
| |
| double rnorm(double mu, double sigma) |
| { |
| if (ISNAN(mu) || !R_FINITE(sigma) || sigma < 0.) |
| ML_ERR_return_NAN; |
| if (sigma == 0. || !R_FINITE(mu)) |
| return mu; /* includes mu = +/- Inf with finite sigma */ |
| else |
| return mu + sigma * norm_rand(); |
| } |