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From "Phil Steitz (JIRA)" <>
Subject [jira] Commented: (MATH-473) Frequency: new option: NON-sorted
Date Thu, 13 Jan 2011 17:57:50 GMT


Phil Steitz commented on MATH-473:

Patches are always welcome :)

> Frequency: new option: NON-sorted
> ---------------------------------
>                 Key: MATH-473
>                 URL:
>             Project: Commons Math
>          Issue Type: Improvement
>    Affects Versions: 1.0, 1.1, 1.2, 2.0, 2.1
>            Reporter: Dan Checkoway
>             Fix For: 3.0
> I have a request for enhancement on org.apache.commons.math.stat.Frequency.  I would
like to be able to specify that the the backing map NOT be sorted.  Right now it uses TreeMap.
 I would like to have the option of specifying that sorting is not important, and would in
fact hinder performance, and a plain old HashMap should be used instead.
> i.e. constructor such as:
> public Frequency(boolean sorted);
> If sorted is true, use a TreeMap.  If sorted is false, use a HashMap.  Is this feasible?
 I'd be happy to contribute a patch if that would help.

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