[commons-statistics] 14/22: Fix inverseCumulativeProbability

[aherbert]

This is an automated email from the ASF dual-hosted git repository.

aherbert pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-statistics.git

commit cbc4298809b24af9144d6024d593dbb1963d42d4
Author: aherbert <aherb...@apache.org>
AuthorDate: Fri Jul 30 15:26:36 2021 +0100

    Fix inverseCumulativeProbability
---
 .../apache/commons/statistics/distribution/LogisticDistribution.java  | 4 ++--
 .../commons/statistics/distribution/LogisticDistributionTest.java     | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git 
a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/LogisticDistribution.java
 
b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/LogisticDistribution.java
index 522ccda..7bbdebd 100644
--- 
a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/LogisticDistribution.java
+++ 
b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/LogisticDistribution.java
@@ -104,9 +104,9 @@ public class LogisticDistribution extends 
AbstractContinuousDistribution {
             p > 1) {
             throw new 
DistributionException(DistributionException.INVALID_PROBABILITY, p);
         } else if (p == 0) {
-            return 0;
+            return SUPPORT_LO;
         } else if (p == 1) {
-            return Double.POSITIVE_INFINITY;
+            return SUPPORT_HI;
         } else {
             return scale * Math.log(p / (1 - p)) + mu;
         }
diff --git 
a/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/LogisticDistributionTest.java
 
b/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/LogisticDistributionTest.java
index 60e7cfe..a6d1de5 100644
--- 
a/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/LogisticDistributionTest.java
+++ 
b/commons-statistics-distribution/src/test/java/org/apache/commons/statistics/distribution/LogisticDistributionTest.java
@@ -81,7 +81,7 @@ class LogisticDistributionTest extends 
ContinuousDistributionAbstractTest {
     @Test
     void testInverseCumulativeProbabilityExtremes() {
         setInverseCumulativeTestPoints(new double[] {0, 1});
-        setInverseCumulativeTestValues(new double[] {0, 
Double.POSITIVE_INFINITY});
+        setInverseCumulativeTestValues(new double[] {Double.NEGATIVE_INFINITY, 
Double.POSITIVE_INFINITY});
         verifyInverseCumulativeProbabilities();
     }