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Welcome to WekaWiki - the Wiki for WEKA (http://www.cs.waikato.ac.nz/~ml/weka/)!

WEKA - The Waikato Environment for Knowledge Analysis

Feel free to contribute all different kinds of information about WEKA, Machine Learning and Data Mining!

News

2007-12-19 Version 3.4.12 and 3.5.7 of Weka released
2007-06-01 Version 3.4.11 and 3.5.6 of Weka released
2007-01-26 Version 3.4.10 and 3.5.5 of Weka released
2007-01-25 The Windows versions of 3.4.9 and 3.5.4 contain a bug in launching Weka (the jars are fine!). more... (https://sourceforge.net/forum/forum.php?forum_id=657484)
2006-12-21 Version 3.4.9 and 3.5.4 of Weka released

Check out the WEKA Homepage (http://www.cs.waikato.ac.nz/~ml/weka/) for documentation, links, etc.
Have a look at the Frequently Asked Questions (FAQ).
Have a look around this Wiki, you might come across an article that answers your question.
The WekaDoc (WEKA Documentation Wiki) contains online documentation based on the PDFs that come with WEKA and more.
If all else fails, either subscribe to the Weka Mailing List and post your query there, or check out the Pentaho forum (http://forums.pentaho.org/forumdisplay.php?f=61).