[commons-rng] 02/04: Updated example sampling parameters for Levy and Stable distributions

[aherbert]

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

commit 7dbc2a56eb519b7ccd2f13e2fd3ebafdff62755a
Author: aherbert <aherb...@apache.org>
AuthorDate: Thu Aug 5 23:12:50 2021 +0100

    Updated example sampling parameters for Levy and Stable distributions
---
 .../sampling/ProbabilityDensityApproximationCommand.java     | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git 
a/commons-rng-examples/examples-sampling/src/main/java/org/apache/commons/rng/examples/sampling/ProbabilityDensityApproximationCommand.java
 
b/commons-rng-examples/examples-sampling/src/main/java/org/apache/commons/rng/examples/sampling/ProbabilityDensityApproximationCommand.java
index 9dc6086..cac392d 100644
--- 
a/commons-rng-examples/examples-sampling/src/main/java/org/apache/commons/rng/examples/sampling/ProbabilityDensityApproximationCommand.java
+++ 
b/commons-rng-examples/examples-sampling/src/main/java/org/apache/commons/rng/examples/sampling/ProbabilityDensityApproximationCommand.java
@@ -306,18 +306,18 @@ class ProbabilityDensityApproximationCommand  implements 
Callable<Void> {
             final double levyLocation = 1.23;
             final double levyscale = 0.75;
             final double levyMin = levyLocation;
-            // Quantile 0.99
-            final double levyMax = 4.7756e+03;
+            // Quantile 0 to 0.7 (avoid long tail to infinity)
+            final double levyMax = 6.2815;
             createDensity(LevySampler.of(rng, levyLocation, levyscale),
                           levyMin, levyMax, "levy");
         }
 
         if (samplers.contains(Sampler.StableSampler)) {
             final double stableAlpha = 1.23;
-            final double stableBeta = 0.25;
-            // Quantiles 0.0005 to 0.9995
-            final double stableMin = -131.9640;
-            final double stableMax = 200.9239;
+            final double stableBeta = 0.75;
+            // Quantiles 0.05 to 0.9 (avoid long tail to infinity)
+            final double stableMin = -1.7862;
+            final double stableMax = 4.0364;
             createDensity(StableSampler.of(rng, stableAlpha, stableBeta),
                           stableMin, stableMax, "stable");
         }