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https://issues.apache.org/jira/browse/MATH-1536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17352907#comment-17352907
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Gilles Sadowski commented on MATH-1536:
---------------------------------------
bq. and StableRandomGenerator (which is not normalized).
Does it in effect mean that
{code}
public class StableRandomGenerator implements NormalizedRandomGenerator { /*
... */ }
{code}
is a false claim?
bq. NormalizedRandomGenerator is used by several classes in the random package.
It is relied on by the UncorrelatedRandomVectorGenerator and
CorrelatedRandomVectorGenerator classes.
That was my point indeed (if the above is correct): One cannot _rely_ on the
{{NormalizedRandomGenerator}} interface.
> Sensitivity to RNG (unit tests)
> -------------------------------
>
> Key: MATH-1536
> URL: https://issues.apache.org/jira/browse/MATH-1536
> Project: Commons Math
> Issue Type: Task
> Reporter: Gilles Sadowski
> Priority: Major
> Labels: rng, unit-test
> Fix For: 4.0
>
>
> Several unit tests fail when upgrading to version 1.3 of "Commons RNG":
> {noformat}
> [ERROR] Failures:
> [ERROR] LogitTest.testDerivativesWithInverseFunction:195 maxOrder = 2
> expected:<0.0> but was:<1.0658141036401503E-14>
> [ERROR] EnumeratedIntegerDistributionTest.testMath1533:196
> [ERROR] EnumeratedIntegerDistributionTest.testSample:174 expected:<7.84>
> but was:<7.857073891264003>
> [ERROR] MiniBatchKMeansClustererTest.testCompareToKMeans:86 Different score
> ratio 46.645378%!, diff points ratio: 34.716981%
> [ERROR] CalinskiHarabaszTest.test_compare_to_skLearn:102
> expected:<597.7763150683217> but was:<559.2829020672648>
> [ERROR] MultiStartMultivariateOptimizerTest.testCircleFitting:76
> expected:<69.9597> but was:<69.96228624385736>
> [ERROR] MultiStartMultivariateOptimizerTest.testRosenbrock:114 numEval=873
> [ERROR] GaussianRandomGeneratorTest.testMeanAndStandardDeviation:37
> expected:<1.0> but was:<0.9715310171501561>
> [ERROR] NaturalRankingTest.testNaNsFixedTiesRandom:227 Array comparison
> failure
> {noformat}
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