[
https://issues.apache.org/jira/browse/MATH-1318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15272924#comment-15272924
]
Eric Prescott-Gagnon commented on MATH-1318:
--------------------------------------------
I checked out the 'develop' branch and issued a new pull request:
https://github.com/apache/commons-math/pull/32
> Implement reflection formula to digamma function to improve performance on
> negative values.
> -------------------------------------------------------------------------------------------
>
> Key: MATH-1318
> URL: https://issues.apache.org/jira/browse/MATH-1318
> Project: Commons Math
> Issue Type: Improvement
> Reporter: Eric Prescott-Gagnon
> Priority: Minor
>
> The performance of the digamma( x ) function is in O(|x|) for negative
> values. Implementing the reflection formula
> (https://en.wikipedia.org/wiki/Digamma_function#Reflection_formula) can
> improve the performance in that case.
> github pull request: https://github.com/apache/commons-math/pull/23
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
