/* cdf/exponentialinv.c * * Copyright (C) 2003 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. */ #include <config.h> #include <math.h> #include <gsl/gsl_math.h> #include <gsl/gsl_cdf.h> double gsl_cdf_exponential_Pinv (const double P, const double mu) { double x = -mu * log1p (-P); return x; } double gsl_cdf_exponential_Qinv (const double Q, const double mu) { double x = -mu * log (Q); return x; }

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