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https://issues.apache.org/jira/browse/LANG-1673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17423499#comment-17423499
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Gilles Sadowski commented on LANG-1673:
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Wasn't this report meant for "Commons Math"?
> Roulette wheel selection
> ------------------------
>
> Key: LANG-1673
> URL: https://issues.apache.org/jira/browse/LANG-1673
> Project: Commons Lang
> Issue Type: New Feature
> Components: lang.*
> Affects Versions: 3.12.0
> Reporter: Ivan Karnasevich
> Priority: Major
>
> Implement roulette wheel selection
> [https://en.wikipedia.org/wiki/Fitness_proportionate_selection]
> For example, if you want to have a probability distribution like this:
> * 1 - 30%
> * 2 - 40%
> * 3 - 25%
> * 4 - 5%
> You will be able to easily achieve this by passing the following argument to
> the new component:
> {code:java}
> {1 : 0.3, 2: 0.4, 3: 0.25, 4: 0.05}
> {code}
> or
> {code:java}
> {1 : 0.6, 2: 0.8, 3: 0.5, 4: 0.1}
> {code}
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