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https://issues.apache.org/jira/browse/MATH-1322?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Morikawa Joe updated MATH-1322:
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Attachment: MersenneTwister.patch
Patch to fix bug.
> Negative integer seed for MersenneTwister is not working.
> ---------------------------------------------------------
>
> Key: MATH-1322
> URL: https://issues.apache.org/jira/browse/MATH-1322
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.6
> Reporter: Morikawa Joe
> Labels: patch
> Attachments: MersenneTwister.patch
>
>
> MersenneTwister.setSeed(int seed) has a bug.
> If seed is negative, longMT also becomes negative.
> First 32 bits are filled by 0xFFFFFFFF.
> But it should be positive. First 32 bits should be filled by 0x00000000.
> Ex) Integer -1 is 0xffffffff.
> Long -1 is 0xffffffffffffffff.
> Long 0xffffffff is 4294967295.
> I created simple patch.
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