commit 7db9d2210ce62879353780f8447e7e9f6255e493
author Alex Herbert <aherbert@apache.org> Fri Jul 30 21:29:44 2021 +0100
committer Alex Herbert <aherbert@apache.org> Fri Jul 30 21:29:44 2021 +0100
tree c50ff76e2844f6fe7bc8d5ef33fb692ba9a5a65a
parent 8f79a54704ed1bc1d5555736e7894d5f4cafa16f

Simplify probability using logProbability

commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/BinomialDistribution.java

diff --git a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/BinomialDistribution.java b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/BinomialDistribution.java
index 506a73a..d9dcc64 100644
--- a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/BinomialDistribution.java
+++ b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/BinomialDistribution.java
@@ -71,8 +71,7 @@
     /** {@inheritDoc} */
     @Override
     public double probability(int x) {
-        final double logProbability = logProbability(x);
-        return logProbability == Double.NEGATIVE_INFINITY ? 0 : Math.exp(logProbability);
+        return Math.exp(logProbability(x));
     }
 
     /** {@inheritDoc} **/

commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/HypergeometricDistribution.java

diff --git a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/HypergeometricDistribution.java b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/HypergeometricDistribution.java
index 7ccb411..6dc6a6a 100644
--- a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/HypergeometricDistribution.java
+++ b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/HypergeometricDistribution.java
@@ -129,8 +129,7 @@
     /** {@inheritDoc} */
     @Override
     public double probability(int x) {
-        final double logProbability = logProbability(x);
-        return logProbability == Double.NEGATIVE_INFINITY ? 0 : Math.exp(logProbability);
+        return Math.exp(logProbability(x));
     }
 
     /** {@inheritDoc} */

commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/PoissonDistribution.java

diff --git a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/PoissonDistribution.java b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/PoissonDistribution.java
index 8444627..bef39c6 100644
--- a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/PoissonDistribution.java
+++ b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/PoissonDistribution.java
@@ -75,8 +75,7 @@
     /** {@inheritDoc} */
     @Override
     public double probability(int x) {
-        final double logProbability = logProbability(x);
-        return logProbability == Double.NEGATIVE_INFINITY ? 0 : Math.exp(logProbability);
+        return Math.exp(logProbability(x));
     }
 
     /** {@inheritDoc} */