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From "Phil Steitz (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MATH-1296) DescriptiveStatistics return geometric mean as 0 when product of values is zero, expected to return NaN
Date Thu, 03 Dec 2015 03:43:10 GMT

     [ https://issues.apache.org/jira/browse/MATH-1296?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phil Steitz resolved MATH-1296.
-------------------------------
    Resolution: Fixed

Fixed in 
b2627dacc (master)
c23e9fb1a (MATH_3_X)

> DescriptiveStatistics return geometric mean as 0 when product of values is zero, expected
to return NaN
> -------------------------------------------------------------------------------------------------------
>
>                 Key: MATH-1296
>                 URL: https://issues.apache.org/jira/browse/MATH-1296
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.4.1
>            Reporter: Anmol
>            Priority: Trivial
>              Labels: easyfix
>   Original Estimate: 168h
>  Remaining Estimate: 168h
>
> 	@Test
> 	public void test() {
> 		DescriptiveStatistics stats = new DescriptiveStatistics();
> 		stats.addValue(1);
> 		stats.addValue(2);
> 		stats.addValue(4);
> 		System.out.println(stats.getGeometricMean()); //prints 2
> 		stats.addValue(0);
> 		System.out.println(stats.getGeometricMean()); //prints 0, expected NaN as per the documentation
> }
> The class in consideration is: org.apache.commons.math3.stat.descriptive.DescriptiveStatistics



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