Weka 3.4.15 (book), 3.6.1 (stable) and 3.7.0 (development)

New versions of Weka are available for download from the Weka homepage:

  • Weka 3.4.15 - the stable book version available as ZIP, Win32 installer, Win32 installer incl. JRE 1.4.2_13 and
    Mac OS X application.

  • Weka 3.6.1 - stable GUI version. It is available as ZIP, with Win32 installer, Win32 installer incl. JRE 1.5.0_18 and Mac OS X application.

  • Weka 3.7.0 - development version. It is available as ZIP, with Win32 installer, Win32 installer incl. JRE 1.5.0_18 and Mac OS X application.

All versions contain a significant number of bugfixes, it is recommended to upgrade to the new versions.

Weka homepage:
http://www.cs.waikato.ac.nz/~ml/weka/

Note:
It might take a while before Sourceforge.net has propagated all the files to its mirrors.

What's new in 3.7.0?

Some highlights

  • Tabu search method for feature selection
  • EM-based imputation of missing values
  • Speed improvements for random trees, which in turn lead faster random forests (up to an order of magnitude faster)
  • Support for importing PMML decision trees
  • Apriori can make use of sparse instances for market basket type data
  • Support for using environment variables in the Knowledge Flow
  • Support for Groovy scripting
  • Improvements to the loading of CSV files
  • Enhanced plugin support in the Explorer's Classify panel
  • Filter for sorting the labels of nominal attributes
  • Information on instance weights displayed in the Preprocess panel of the Explorer
  • Wrapper feature selection now supports mae, f-measure, auc, rmse (probabilities), mae (probabilities) as well as the original error rate and rmse
  • Converters to read and write Matlab's ASCII file format

As usual, for a complete list of changes refer to
the changelogs.

Cheers,
The Weka Team

Posted by Mark Hall 2009-06-05

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