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Posted to commits@commons.apache.org by ah...@apache.org on 2021/09/14 12:10:07 UTC
[commons-statistics] 02/08: Use a ZigguratSampler.Exponential
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 d046cc897ec1862c91c8ecf084e3f31a8e6c211b
Author: aherbert <ah...@apache.org>
AuthorDate: Tue Sep 14 11:43:58 2021 +0100
Use a ZigguratSampler.Exponential
---
.../statistics/distribution/ExponentialDistribution.java | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)
diff --git a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ExponentialDistribution.java b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ExponentialDistribution.java
index c37238d..295a03d 100644
--- a/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ExponentialDistribution.java
+++ b/commons-statistics-distribution/src/main/java/org/apache/commons/statistics/distribution/ExponentialDistribution.java
@@ -17,7 +17,7 @@
package org.apache.commons.statistics.distribution;
import org.apache.commons.rng.UniformRandomProvider;
-import org.apache.commons.rng.sampling.distribution.AhrensDieterExponentialSampler;
+import org.apache.commons.rng.sampling.distribution.ZigguratSampler;
/**
* Implementation of the <a href="http://en.wikipedia.org/wiki/Exponential_distribution">exponential distribution</a>.
@@ -162,18 +162,10 @@ public class ExponentialDistribution extends AbstractContinuousDistribution {
return true;
}
- /**
- * {@inheritDoc}
- *
- * <p>Sampling algorithm uses the
- * <a href="http://www.jesus.ox.ac.uk/~clifford/a5/chap1/node5.html">
- * inversion method</a> to generate exponentially distributed
- * random values from uniform deviates.
- * </p>
- */
+ /** {@inheritDoc} */
@Override
public ContinuousDistribution.Sampler createSampler(final UniformRandomProvider rng) {
// Exponential distribution sampler.
- return AhrensDieterExponentialSampler.of(rng, mean)::sample;
+ return ZigguratSampler.Exponential.of(rng, mean)::sample;
}
}