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Posted to issues@commons.apache.org by "Thomas Neidhart (JIRA)" <ji...@apache.org> on 2015/04/14 14:19:12 UTC
[jira] [Resolved] (MATH-1203) getKernel fails for buckets with only
multiple instances of the same value in random.EmpiricalDistribution
[ https://issues.apache.org/jira/browse/MATH-1203?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Thomas Neidhart resolved MATH-1203.
-----------------------------------
Resolution: Fixed
Fix Version/s: 3.5
4.0
> getKernel fails for buckets with only multiple instances of the same value in random.EmpiricalDistribution
> ----------------------------------------------------------------------------------------------------------
>
> Key: MATH-1203
> URL: https://issues.apache.org/jira/browse/MATH-1203
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.4, 3.4.1
> Reporter: Kyle Kavanagh
> Fix For: 4.0, 3.5
>
>
> After loading a set of values into an EmpericalDistribution, assume that there's a case where a single bin ONLY contains multiple instances of the same value. In this case the standard deviation will equal zero. This will fail when getKernel attempts to create a NormalDistribution. The other case where stddev=0 is when there is only a single value in the bin, and this is handled by returning a ConstantRealDistribution rather than a NormalDistrbution.
> See: https://issues.apache.org/jira/browse/MATH-984
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