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From "Mikkel Meyer Andersen (JIRA)" <j...@apache.org>
Subject [jira] Created: (MATH-384) DescriptiveStatistics based on double[]
Date Wed, 14 Jul 2010 17:59:49 GMT
DescriptiveStatistics based on double[]
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                 Key: MATH-384
                 URL: https://issues.apache.org/jira/browse/MATH-384
             Project: Commons Math
          Issue Type: New Feature
            Reporter: Mikkel Meyer Andersen
            Priority: Minor


Right now the DescriptiveStatistics is for ResizableDoubleArray, but if the user has the double[]
data she wishes to get DescriptiveStatistics for there is no way of doing this (besides the
inefficient way of creating a ResizableDoubleArray from the double[]).

It would be possible to use StatUtils, but it does not contain near as much functionality
as DescriptiveStatistics.

Idea: Create a DescriptiveStatistics for double[] also. I'm not sure which way of implementing
it would be the best, but one way would be to make DescriptiveStatistics abstract with all
but the apply-method implemented as now. The apply-method should be made as abstract which
then has to implemented in the extensions together with a field containing the values. (addValue,
windowSize etc. has to go in the ResizableDoubleArray-extension.) The double[]-extension should
then have a constructor taking double[] as a parameter.

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