1 files changed, 53 insertions, 0 deletions
diff --git a/gsl-1.9/randist/flat.c b/gsl-1.9/randist/flat.c
new file mode 100644
index 0000000..6bae5a4
--- /dev/null
+++ b/gsl-1.9/randist/flat.c
@@ -0,0 +1,53 @@
+/* randist/flat.c
+ * 
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000 James Theiler, 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_rng.h>
+#include <gsl/gsl_randist.h>
+
+/* This is the uniform distribution in the range [a, b)
+
+   p(x) dx = 1/(b-a) dx   if  a <= x < b
+   .....   = 0            otherwise 
+
+ */
+
+double
+gsl_ran_flat (const gsl_rng * r, const double a, const double b)
+{
+  double u = gsl_rng_uniform (r);
+
+  /* A uniform distribution over [a,b] */
+
+  return a * (1 - u) + b * u;
+}
+
+double
+gsl_ran_flat_pdf (double x, const double a, const double b)
+{
+  if (x < b && x >= a)
+    {
+      return 1 / (b - a);
+    }
+  else
+    {
+      return 0;
+    }
+}