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From "Thomas Neidhart (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MATH-1205) AbstractStorelessUnivariateStatistic should not extend AbstractUnivariateStatistic
Date Fri, 20 Feb 2015 12:45:12 GMT
Thomas Neidhart created MATH-1205:
-------------------------------------

             Summary: AbstractStorelessUnivariateStatistic should not extend AbstractUnivariateStatistic
                 Key: MATH-1205
                 URL: https://issues.apache.org/jira/browse/MATH-1205
             Project: Commons Math
          Issue Type: Bug
    Affects Versions: 3.4.1
            Reporter: Thomas Neidhart


For a storeless statistic it is wrong to extend AbstractUnivariateStatistic as various fields
and methods are inherited that do not make sense in case of a storeless statistic.

This means a user can accidentially use a storeless statistic in a wrong way:

{code}
        Mean mean = new Mean();
        
        mean.increment(1);
        mean.increment(2);
        
        mean.setData(new double[] { 1, 2, 3});
        
        System.out.println(mean.getResult());
        System.out.println(mean.evaluate());
{code}

will output

{noformat}
1.5
2.0
{noformat}



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