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Commons-Math Wish List

A list of feature requests made by Commons-Math users, contributors, and committers. These requests will be considered when deciding on new functionality for future releases. At any time, additional feature requests can be added simply by editing this page.

  • Add remedian statistic - [http://www.agoras.ua.ac.be/abstract/Remrob90.htm The Remedian: a Robust Averaging method for Large Data Sets]

  • Add population variance and standard deviation statistic.
  • Add alternative pseudo-random number generators (PRNGs)
    • "implement good random number generators, e.g., like those described in Numerical Recipes or Knuth". – AlChou

    • I highly recommend working with Paul Houle [http://www.honeylocust.com/RngPack/] to get these random number generators integrated into the math library. He has stated to me in the past that he is willing to relicense them under the Apache license. As well I beleive that with the BSD being compatable with Apache licensing, there would be little stopping us from integrating them ourselves as a derivative work. - Mark Diggory

    • Support PRNG-pluggability throughout the random package.

    • Investigate alternative methods for generating values from discrete distributions [http://www.jstatsoft.org/v11/i03/]

  • Add sparse matrix implementation. [http://mail-archives.apache.org/eyebrowse/BrowseList?listName=commons-dev@jakarta.apache.org&by=thread&from=736078]

  • Add submatrix accessors - [http://issues.apache.org/bugzilla/show_bug.cgi?id=30896]

  • Add rounding utilties [http://www.theserverside.com/news/thread.tss?thread_id=28596#137352]

  • Develop Genetic Algorithms Framework [http://mail-archives.apache.org/eyebrowse/BrowseList?listName=commons-dev@jakarta.apache.org&by=thread&from=882939]

  • Resampling [http://mail-archives.apache.org/eyebrowse/BrowseList?listName=commons-dev@jakarta.apache.org&by=thread&from=582054]

  • Applied-mathematical/Mathematical-physics algorithms? - Henri Yandell
    • Examples, please? This item goes to the heart of what I consider an ongoing lack of consensus about what Commons-Math is supposed to be for. Should it include discipline-specific algorithms that do not overlap core numerical mathematical areas? Maybe, but we should discuss it. – AlChou

  • "Rolling" statistics with large windows but limited storage [http://mail-archives.apache.org/eyebrowse/ReadMsg?listName=commons-dev@jakarta.apache.org&msgNo=41870]

    • I don't understand; we already have some storage-less statistics. What am I missing from the post you refer to? – AlChou
    • Oh, I remember now that with the standard deviation algorithm I researched, in order to maintain a rolling window, it would have to store all the data in the window so it could delete the least recent one while adding the most recent one. Sorry for the denseness. – AlChou
  • Provide FFT's. – AlChou
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