A JRuby version of the Ruby classifier library

Original repository: https://github.com/cardmagic/classifier

The library and gem at https://github.com/cardmagic/classifier can use the gsl and rb-gsl gems if they are installed. These native gems use the GNU GSL numeric library and are very efficient.

I found that, GSL issues aside, that the original classifier library code would not work, at least on my system, with JRuby, so I took the minimum code and hacked on it a bit so it works with JRuby.

I did not package this as a Ruby gem. Instead, copy classifier.rb and the classifier directory into any project. The file examples.rb shows how to use:

• LSI classifier
• LSI summarizer
• Bayes classifier

The pure Ruby code for calculating singular value decomposition (SVD) throws runtime errors if trained on very short text strings. The original version that uses the GNU GSL library does not have this problem.

Mark Watson http://markwatson.com

2014/10/04