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Corrected the fix for MATH-1208.

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This commit is contained in:
Phil Steitz 2015-03-09 12:37:57 -07:00
parent b148046add
commit ce2badf02e
2 changed files with 9 additions and 5 deletions
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6
src/main/java/org/apache/commons/math4/random/EmpiricalDistribution.java
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@ -610,7 +610,11 @@ public class EmpiricalDistribution extends AbstractRealDistribution {
final double pB = pB(binIndex);
final RealDistribution kernel = k(x);
if (kernel instanceof ConstantRealDistribution) {
return pBminus + pB;
if (x < kernel.getNumericalMean()) {
return pBminus;
} else {
return pBminus + pB;
}
}
final double[] binBounds = getUpperBounds();
final double kB = kB(binIndex);

8
src/test/java/org/apache/commons/math4/random/EmpiricalDistributionTest.java
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@ -446,7 +446,7 @@ public final class EmpiricalDistributionTest extends RealDistributionAbstractTes
Assert.assertEquals(0.5, dist.cumulativeProbability(0), Double.MIN_VALUE);
Assert.assertEquals(1.0, dist.cumulativeProbability(1), Double.MIN_VALUE);
Assert.assertEquals(0.5, dist.cumulativeProbability(0.5), Double.MIN_VALUE);
Assert.assertEquals(1.0, dist.cumulativeProbability(0.7), Double.MIN_VALUE);
Assert.assertEquals(0.5, dist.cumulativeProbability(0.7), Double.MIN_VALUE);
}
/**
@ -486,11 +486,11 @@ public final class EmpiricalDistributionTest extends RealDistributionAbstractTes
Assert.assertTrue(Arrays.binarySearch(values, dist.sample()) >= 0);
}
final double tol = 10E-12;
Assert.assertEquals(0.2, dist.cumulativeProbability(1), tol);
Assert.assertEquals(0.0, dist.cumulativeProbability(1), tol);
Assert.assertEquals(0.2, dist.cumulativeProbability(2), tol);
Assert.assertEquals(0.8, dist.cumulativeProbability(10), tol);
Assert.assertEquals(0.6, dist.cumulativeProbability(10), tol);
Assert.assertEquals(0.8, dist.cumulativeProbability(12), tol);
Assert.assertEquals(1.0, dist.cumulativeProbability(13), tol);
Assert.assertEquals(0.8, dist.cumulativeProbability(13), tol);
Assert.assertEquals(1.0, dist.cumulativeProbability(15), tol);
Assert.assertEquals(2.0, dist.inverseCumulativeProbability(0.1), tol);