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https://issues.apache.org/jira/browse/MATH-1189?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phil Steitz updated MATH-1189:
------------------------------
Affects Version/s: (was: 3.3)
Fix Version/s: 3.4.2
> SimpleRegression may not report fit statistics correctly for perfect linear
> models
> ----------------------------------------------------------------------------------
>
> Key: MATH-1189
> URL: https://issues.apache.org/jira/browse/MATH-1189
> Project: Commons Math
> Issue Type: Bug
> Reporter: Phil Steitz
> Fix For: 3.4.2
>
>
> The getSignificance(), getRSquare() and getR() methods can return infinite
> values when they should return 0, 1 and 1 respectively if the sum of squared
> errors is exactly 0.
> From Jenkins test run:
> {code}
> java.lang.AssertionError: expected:<0.0> but was:<Infinity>
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.failNotEquals(Assert.java:743)
> at org.junit.Assert.assertEquals(Assert.java:494)
> at org.junit.Assert.assertEquals(Assert.java:592)
> at
> org.apache.commons.math3.stat.regression.SimpleRegressionTest.testPerfect(SimpleRegressionTest.java:546)
> {code}
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