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From "Lukas Theussl (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MATH-166) Special functions not very accurate
Date Mon, 04 Jun 2007 09:36:35 GMT

     [ https://issues.apache.org/jira/browse/MATH-166?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lukas Theussl updated MATH-166:
-------------------------------

    Attachment: MATH-166.patch

Patch to increase the default accuracy and corresponding tests.

> Special functions not very accurate
> -----------------------------------
>
>                 Key: MATH-166
>                 URL: https://issues.apache.org/jira/browse/MATH-166
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 1.1
>            Reporter: Lukas Theussl
>            Priority: Minor
>         Attachments: MATH-166.patch
>
>
> The Gamma and Beta functions return values in double precision but the default epsilon
is set to 10e-9. I think that the default should be set to the highest possible accuracy,
as this is what I'd expect to be returned by a double precision routine. Note that the erf
function already uses a call to Gamma.regularizedGammaP with an epsilon of 1.0e-15.

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