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https://issues.apache.org/jira/browse/STATISTICS-71?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17772551#comment-17772551
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Alex Herbert commented on STATISTICS-71:
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Added the Skewness and Kurtosis statistics in commit:
27717aacd23507706a77d914289a7051ad8de25e
The updating algorithm for the underlying sum-of-cubed and sum-of-fourth
deviations is based on the following paper:
{noformat}
Manca and Marin (2020)
Decomposition of the Sum of Cubes, the Sum Raised to the
Power of Four and Codeviance.
Applied Mathematics, 11, 1013-1020.
{noformat}
[DOI: 10.4236/am.2020.1110067|https://doi.org/10.4236/am.2020.1110067]
Note. The formula provided for combining two sum-of-fourth deviations required
a correction. Details of this are in the class javadoc.
When the formula for updating two arbitrary deviations of sizes n1 and n2 is
simplified to set n1=1, then the formula reduces to the updating algorithm used
in Commons Math.
> 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
> Assignee: 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(DoubleStorelessUnivariateStatistic other);
> } {code}
>
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