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commit d4de59a15a73e585ae74481bd1fb1265286d3955 Author: Maciej Kwidzinski <mkwidzin...@atlassian.com> AuthorDate: Fri Sep 17 13:58:19 2021 +0200 MATH-1462: Reproduce the infinite quantile bug --- .../distribution/EmpiricalDistributionTest.java | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/distribution/EmpiricalDistributionTest.java b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/distribution/EmpiricalDistributionTest.java index b51a8ec..4f26e4e 100644 --- a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/distribution/EmpiricalDistributionTest.java +++ b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/distribution/EmpiricalDistributionTest.java @@ -474,4 +474,28 @@ public final class EmpiricalDistributionTest extends RealDistributionAbstractTes v = ed.inverseCumulativeProbability(p); Assert.assertTrue("p=" + p + " => v=" + v, v < 6350); } + + @Test + public void testMath1462InfiniteQuantile() { + final double[] data = { + 18054, 17548, 17350, 17860, 17827, 17653, 18113, 18405, 17746, + 17647, 18160, 17955, 17705, 17890, 17974, 17857, 13287, 18645, + 17775, 17730, 17996, 18263, 17861, 17161, 17717, 18134, 18669, + 18340, 17221, 18292, 18146, 17520, 18207, 17829, 18206, 13301, + 18257, 17626, 18358, 18340, 18320, 17852, 17804, 17577, 17718, + 18099, 13395, 17763, 17911, 17978, 12935, 17519, 17550, 18728, + 18518, 17698, 18739, 18553, 17982, 18113, 17974, 17961, 17645, + 17867, 17890, 17498, 18718, 18191, 18177, 17923, 18164, 18155, + 6212, 5961, 711 + }; + + final EmpiricalDistribution ed = EmpiricalDistribution.from(1000, data); + + double v; + double p; + + p = 0.32; + v = ed.inverseCumulativeProbability(p); + Assert.assertTrue("p=" + p + " => v=" + v, Double.isFinite(v)); + } }