[jira] [Commented] (STATISTICS-71) Implementation of Univariate Statistics

["Alex Herbert (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/STATISTICS-71?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17739356#comment-17739356 ] 

Alex Herbert commented on STATISTICS-71:
----------------------------------------

I am not convinced we require:
{code:java}
long getN();{code}
In cases where you wish for a simple statistic (min, max, sum) then computing the count is a waste of resources. If you combine several statistics then all will compute the count and this is also a waste of resources as you only require one.

> Implementation of Univariate Statistics
> ---------------------------------------
>
>                 Key: STATISTICS-71
>                 URL: https://issues.apache.org/jira/browse/STATISTICS-71
>             Project: Commons Statistics
>          Issue Type: Task
>          Components: descriptive
>            Reporter: Anirudh Joshi
>            Priority: Minor
>              Labels: gsoc, gsoc2023
>
> Jira ticket to track the implementation of the Univariate statistics required for the updated SummaryStatistics API. 
> The implementation would be "storeless". It should be used for calculating statistics that can be computed in one pass through the data without storing the sample values.
> Currently I have the definition of API as (this might evolve as I continue working)
> {code:java}
> public interface DoubleStorelessUnivariateStatistic extends DoubleSupplier {
>     DoubleStorelessUnivariateStatistic add(double v);
>     long getCount();
>     void combine(StorelessUnivariateStatistic other);
> } {code}
>  



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