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Posted to issues@commons.apache.org by "Luc Maisonobe (JIRA)" <ji...@apache.org> on 2013/04/07 11:21:16 UTC
[jira] [Closed] (MATH-935) DerivativeStructure.atan2(y,x) does not
handle special cases properly
[ https://issues.apache.org/jira/browse/MATH-935?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Luc Maisonobe closed MATH-935.
------------------------------
Closing issue as version 3.2 has been released on 2013-04-06.
> DerivativeStructure.atan2(y,x) does not handle special cases properly
> ---------------------------------------------------------------------
>
> Key: MATH-935
> URL: https://issues.apache.org/jira/browse/MATH-935
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.1.1
> Reporter: Luc Maisonobe
> Priority: Minor
> Fix For: 3.2
>
>
> The four special cases +/-0 for both x and y should give the same values as Math.atan2 and FastMath.atan2. However, they give NaN for the value in all cases.
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