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https://issues.apache.org/jira/browse/MATH-1671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17940980#comment-17940980
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Alex Herbert commented on MATH-1671:
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I'll make the remaining modifications to the current legacy package and leave 
moving any code to a new package for another task. Note that the stat package 
has other packages not changed by the reduction in code in the descriptive 
package: correlation; interval; and regression. So either all are moved to a 
new stat module or multiple sub-modules. The regression package still has a 
ticket to move to Commons Statistics (see STATISTICS-8).

The final changes are:
 * Remove summary statistics for sum-of-logs and geometric mean
 * Rename the weighted statistic implementations
 * Reduce the method overrides for the SemiVariance
 * Remove the equals and hashcode implementations (and enforcing tests)

 

> Reuse "Commons Statistics" (descriptive)
> ----------------------------------------
>
>                 Key: MATH-1671
>                 URL: https://issues.apache.org/jira/browse/MATH-1671
>             Project: Commons Math
>          Issue Type: Sub-task
>          Components: legacy
>    Affects Versions: 4.0-beta1
>            Reporter: Gilles Sadowski
>            Priority: Major
>              Labels: pull-request-available, refactor
>             Fix For: 4.0-beta2
>
>
> Reuse functionality in module 
> [{{descriptive}}|https://commons.apache.org/proper/commons-statistics/commons-statistics-docs/apidocs/org/apache/commons/statistics/descriptive/package-summary.html].



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