From: Ryan Davis <ryand-ruby@...>
Date: 2011-05-27T05:29:27+09:00
Subject: Re: Doing LSI at scale in Ruby


On May 26, 2011, at 11:32 , Chris Kottom wrote:

> Just for context, I've been working on this problem for a few days now.
> I've tried the Classifier gem via "gem install" and compiled from source
> and at least two other forks.  I've tried compiling various versions of the
> GSL library, most of which would not allow the gsl gem to compile, and it
> seems that in the combinations where I can actually get the full set of
> libraries to install, I receive an error like the following:
> 
> /home/ck1/.rvm/gems/ruby-1.9.2-p180@classifier_test/gems/kitop-classifier-1.4.4/lib/classifier/lsi.rb:316:in
> `SV_decomp': Ruby/GSL error code 24, svd of MxN matrix, M<N, is not
> implemented (file svd.c, line 61), the requested feature is not (yet)
> implemented (GSL::ERROR::EUNIMPL)
>        from /home/ck1/.rvm/gems/ruby-1.9.2-p180@classifier_test/gems/kitop-classifier-1.4.4/lib/classifier/lsi.rb:316:in
> `build_reduced_matrix'
>        from /home/ck1/.rvm/gems/ruby-1.9.2-p180@classifier_test/gems/kitop-classifier-1.4.4/lib/classifier/lsi.rb:128:in
> `build_index'
>        from /home/ck1/.rvm/gems/ruby-1.9.2-p180@classifier_test/gems/kitop-classifier-1.4.4/lib/classifier/lsi.rb:66:in
> `add_item'
>        from lsi_test.rb:18:in `block in <main>'
>        from lsi_test.rb:18:in `each'
>        from lsi_test.rb:18:in `<main>'
> 
> This particular stack trace was when running with a fork of Classifier, but
> the result is essentially the same with the original gem with the exception
> of the line numbers, and it looks as though the error is unrelated to
> Classifier but rather the gsl gem or the underlying GSL library.

You'd be better off contacting the author. There is no guarantee that they read this list.