[jira] Resolved: (MATH-448) Frequency get number of unique values

["Phil Steitz (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MATH-448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Phil Steitz resolved MATH-448.
------------------------------

    Resolution: Fixed

Thanks for the patch!

I committed a slightly modified version in r1044981.   I made the following changes to the patch:

* Changed the javadoc to refer to "values" to be consistent with the rest of the documentation
* Used keyset.size() to compute the result
* Added test cases

> Frequency get number of unique values
> -------------------------------------
>
>                 Key: MATH-448
>                 URL: https://issues.apache.org/jira/browse/MATH-448
>             Project: Commons Math
>          Issue Type: New Feature
>            Reporter: Patrick Meyer
>            Priority: Minor
>             Fix For: 2.2
>
>         Attachments: MATH-448.patch, MATH-448.patch
>
>   Original Estimate: 0.25h
>  Remaining Estimate: 0.25h
>
> It is often useful to know the number of unique elements in a frequency table. Could you add a simple method that returns the size of freqTable. It seems like it would be as simple as:
> {code}
> public int getUniqueCount(){
>      return freqTable.size();
> }
> {code}
> Given that freqTable is private, there is no way to extend the class and add this method. Thanks!

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