1 files changed, 65 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/math/distribution/BetaDistribution.java b/src/main/java/org/apache/commons/math/distribution/BetaDistribution.java
new file mode 100644
index 0000000..7693b04
--- /dev/null
+++ b/src/main/java/org/apache/commons/math/distribution/BetaDistribution.java
@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.math.distribution;
+
+import org.apache.commons.math.MathException;
+
+/**
+ * Computes the cumulative, inverse cumulative and density functions for the beta distribuiton.
+ *
+ * @see <a href="http://en.wikipedia.org/wiki/Beta_distribution">Beta_distribution</a>
+ * @version $Revision: 920852 $ $Date: 2010-03-09 13:53:44 +0100 (mar. 09 mars 2010) $
+ * @since 2.0
+ */
+public interface BetaDistribution extends ContinuousDistribution, HasDensity<Double> {
+    /**
+     * Modify the shape parameter, alpha.
+     * @param alpha the new shape parameter.
+     * @deprecated as of 2.1
+     */
+    @Deprecated
+    void setAlpha(double alpha);
+
+     /**
+      * Access the shape parameter, alpha
+      * @return alpha.
+      */
+     double getAlpha();
+
+     /**
+      * Modify the shape parameter, beta.
+      * @param beta the new scale parameter.
+      * @deprecated as of 2.1
+      */
+     @Deprecated
+     void setBeta(double beta);
+
+     /**
+      * Access the shape parameter, beta
+      * @return beta.
+      */
+     double getBeta();
+
+     /**
+      * Return the probability density for a particular point.
+      * @param x  The point at which the density should be computed.
+      * @return  The pdf at point x.
+      * @exception MathException if probability density cannot be computed
+      */
+     double density(Double x) throws MathException;
+
+}