1 files changed, 66 insertions, 0 deletions
diff --git a/gsl-1.9/cdf/beta.c b/gsl-1.9/cdf/beta.c
new file mode 100644
index 0000000..524391d
--- /dev/null
+++ b/gsl-1.9/cdf/beta.c
@@ -0,0 +1,66 @@
+/* cdf/cdf_beta.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., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <config.h>
+#include <math.h>
+#include <gsl/gsl_cdf.h>
+#include <gsl/gsl_sf_gamma.h>
+#include <gsl/gsl_math.h>
+
+#include "beta_inc.c"
+
+double
+gsl_cdf_beta_P (const double x, const double a, const double b)
+{
+  double P;
+
+  if (x <= 0.0 )
+    {
+      return 0.0;
+    }
+
+  if ( x >= 1.0 )
+    {
+      return 1.0;
+    }
+
+  P = beta_inc_AXPY (1.0, 0.0, a, b, x);
+
+  return P;
+}
+
+double
+gsl_cdf_beta_Q (const double x, const double a, const double b)
+{
+  double Q;
+
+  if ( x >= 1.0)
+    {
+      return 0.0;
+    }
+
+  if ( x <= 0.0 )
+    {
+      return 1.0;
+    }
+
+  Q = beta_inc_AXPY (-1.0, 1.0, a, b, x);
+
+  return Q;
+}