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MATH-1462: Reproduce the infinite quantile bug #198

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MATH-1462: Reproduce the infinite quantile bug #198

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24 changes: 24 additions & 0 deletions ...src/test/java/org/apache/commons/math4/legacy/distribution/EmpiricalDistributionTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -474,4 +474,28 @@ public void testMath1462() {
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));
}
}