[jira] [Commented] (STATISTICS-62) Port o.a.c.math.stat.inference to a commons-statistics-inference module

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

    [ https://issues.apache.org/jira/browse/STATISTICS-62?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17642928#comment-17642928 ] 

Alex Herbert commented on STATISTICS-62:
----------------------------------------

Inference relies on the ranking package (see STATISTICS-63).

> Port o.a.c.math.stat.inference to a commons-statistics-inference module
> -----------------------------------------------------------------------
>
>                 Key: STATISTICS-62
>                 URL: https://issues.apache.org/jira/browse/STATISTICS-62
>             Project: Commons Statistics
>          Issue Type: New Feature
>          Components: inference
>    Affects Versions: 1.0
>            Reporter: Alex Herbert
>            Priority: Major
>
> The o.a.c.math4.legacy.stat.inference package contains:
>  
> {noformat}
> AlternativeHypothesis.java
> BinomialTest.java
> ChiSquareTest.java
> GTest.java
> InferenceTestUtils.java
> KolmogorovSmirnovTest.java
> MannWhitneyUTest.java
> OneWayAnova.java
> TTest.java
> WilcoxonSignedRankTest.java{noformat}
> The are few dependencies on other math packages. The notable exceptions are:
>  
> 1. KolmogorovSmirnovTest which requires matrix support. This is for multiplication of a square matrix to support a matrix power function. This uses a double matrix and the same code is duplicated for a BigFraction matrix. Such code can be ported internally to support only the required functions. It can also drop the defensive copy strategy used by Commons Math in matrices to allow multiply in-place where appropriate for performance gains.
> 2. OneWayAnova which collates the sum, sum of squares and count using SummaryStatistics. This can be done using an internal class. It is possible to call the test method using already computed SummaryStatistics. The method that does this using the SummaryStatistics as part of the API can be dropped, or supported using an interface that returns: getSum, getSumOfSquares, getN.
> All the inference Test classes have instance methods but no state. The InferenceTestUtils is a static class that holds references to a singleton for each class and provides static methods to pass through the underlying instances.
> I suggest changing the test classes to have only static methods and dropping InferenceTestUtils.
>  



--
This message was sent by Atlassian Jira
(v8.20.10#820010)