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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 20175] New: - [math] improvements to UnivariateImpl
Date Fri, 23 May 2003 08:16:57 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=20175

[math] improvements to UnivariateImpl

           Summary: [math] improvements to UnivariateImpl
           Product: Commons
           Version: Nightly Builds
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Sandbox
        AssignedTo: commons-dev@jakarta.apache.org
        ReportedBy: phil@steitz.com


The attached patch includes the following improvements to Univariate and
UnivariateImpl:

* Improved efficiency of min, max and product maintenance when windowSize is 
  limited by incorporating suggestion posted to commons-dev by Brend Worden 
  (added author credit).  Thanks, Brent!

* Added javadoc specifying NaN contracts for all statistics, definitions for
  geometric and arithmetic means.

* Made some slight modifications to UnivariateImpl to make it consistent with
  NaN contracts

* All interface documentation moved to Univariate. The interface specification
  includes the NaN semantics and a first attempt at clealy defining exactly what
  "rolling" means and how this effects what statistics are defined when.

* Added test cases to verify that min, max, product are correctly maintained
  when "rolling" and to verify that NaN contracts are satisfied.

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