Comments on: Weka and Ruby http://www.tylerclemons.com/weka-and-ruby/ tylerclemons.com Sat, 10 Sep 2011 05:32:51 +0000 http://wordpress.org/?v=2.8.4 hourly 1 By: Tyler http://www.tylerclemons.com/weka-and-ruby/comment-page-1/#comment-12421 Tyler Wed, 07 Sep 2011 04:01:21 +0000 http://www.tylerclemons.com/?p=256#comment-12421 iirc that error means you have not specified which one of your attributes is the class attribute. That is usually your last variable. I have an example of the classifier; I made a post using decision trees <a href="http://www.tylerclemons.com/weka-ruby-decision-trees/" rel="nofollow">-->HERE.<--</a> The line I used: labor_data.setClassIndex(labor_data.numAttributes() – 1) Should set the last attribute as the class variable iirc that error means you have not specified which one of your attributes is the class attribute. That is usually your last variable.

I have an example of the classifier; I made a post using decision trees –>HERE.<–

The line I used:
labor_data.setClassIndex(labor_data.numAttributes() – 1)

Should set the last attribute as the class variable

]]> By: Ryan http://www.tylerclemons.com/weka-and-ruby/comment-page-1/#comment-12416 Ryan Tue, 06 Sep 2011 22:58:10 +0000 http://www.tylerclemons.com/?p=256#comment-12416 Excellent post! Helped me a lot. I am trying to get a classifier working in ruby but keep running into a "Class attribute not set!" error. Hopefully you get those classifier examples up soon :-) Excellent post! Helped me a lot. I am trying to get a classifier working in ruby but keep running into a “Class attribute not set!” error. Hopefully you get those classifier examples up soon :-)

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