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From "Sebb (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (MATH-1007) Add mode function to StatUtils class
Date Tue, 16 Jul 2013 10:34:49 GMT

    [ https://issues.apache.org/jira/browse/MATH-1007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13709662#comment-13709662
] 

Sebb edited comment on MATH-1007 at 7/16/13 10:34 AM:
------------------------------------------------------

Sample implementation - this does not use a separate helper class, and does its own parameter
validation.
                
      was (Author: sebb@apache.org):
    Sample implementation
                  
> Add mode function to StatUtils class
> ------------------------------------
>
>                 Key: MATH-1007
>                 URL: https://issues.apache.org/jira/browse/MATH-1007
>             Project: Commons Math
>          Issue Type: New Feature
>            Reporter: Sebb
>         Attachments: MATH-1007.patch
>
>
> It might be useful to have a StatUtils function to get the mode.
> However, this may be tricky as it does not easily fit in with the current StatUtils design.
> The mode can have multiple elements, but all the other methods only return a single value.
> There are at least two options for converting an array to a single value:
> - arbitrarily (or randomly) pick one
> - throw an Exception if there is more than one mode
> Or maybe StatUtils should return a double array.
> StatUtils also uses nested classes for all but the difference and normalize methods.
However the standard interfaces and classes don't support returning arrays.

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