From: Dan Wade <dan.wade@...>
Date: 2007-04-08T02:34:04+09:00
Subject: Re: ruby classifier


I've spent a couple of days trying to get LSI Classifer to work. The 
Bayesian library works fine (and is fun), but LSI is not working for me. 
I have the GSL installed and the ruby-gsl wrapper, which seem to be 
working fine. However, I get the same error as mentioned in the previous 
post. The error occurs as the 2nd item is added to the index. It occurs 
somewhere within the rebuild_index procedure. If auto_index is switched 
off, items can be added infinitum. Please help :S

#--------test script

require 'rubygems'
require 'gsl'
require 'classifier'
require 'stemmer'

  lsi = Classifier::LSI.new
  strings = [ ["This text deals with dogs. Dogs.", :dog],
              ["This text involves dogs too. Dogs! ", :dog],
              ["This text revolves around cats. Cats.", :cat],
              ["This text also involves cats. Cats!", :cat],
              ["This text involves birds. Birds.",:bird ]]
  strings.each {|x| lsi.add_item x.first, x.last}

  lsi.search("dog", 3)
  # returns => ["This text deals with dogs. Dogs.", "This text involves 
dogs too
. Dogs! ",
  #             "This text also involves cats. Cats!"]

  lsi.find_related(strings[2], 2)
  # returns => ["This text revolves around cats. Cats.", "This text also 
involve
s cats. Cats!"]

  lsi.classify "This text is also about dogs!"
  # returns => :dog


#--------error

/usr/lib/ruby/gems/1.8/gems/classifier-1.3.0/lib/classifier/extensions/string.rb:6:Warning: 
require_gem is obsolete.  Use gem instead.
/usr/lib/ruby/gems/1.8/gems/classifier-1.3.0/lib/classifier/lsi/content_node.rb:37:in 
`initialize': wrong number of arguments (1 for 0) (ArgumentError)
        from 
/usr/lib/ruby/gems/1.8/gems/classifier-1.3.0/lib/classifier/lsi/content_node.rb:37:in 
`new'
        from 
/usr/lib/ruby/gems/1.8/gems/classifier-1.3.0/lib/classifier/lsi/content_node.rb:37:in 
`raw_vector_with'
        from 
/usr/lib/ruby/gems/1.8/gems/classifier-1.3.0/lib/classifier/lsi.rb:123:in 
`build_index'
        from 
/usr/lib/ruby/gems/1.8/gems/classifier-1.3.0/lib/classifier/lsi.rb:123:in 
`collect'
        from 
/usr/lib/ruby/gems/1.8/gems/classifier-1.3.0/lib/classifier/lsi.rb:123:in 
`build_index'
        from 
/usr/lib/ruby/gems/1.8/gems/classifier-1.3.0/lib/classifier/lsi.rb:65:in 
`add_item'
        from lsitest.rb:12
        from lsitest.rb:12:in `each'
        from lsitest.rb:12


Dan

Colin Brander wrote:
> Ah, whoops, that part is fixed now. But when to add items to the LSI 
> classifier, I get:
> 
>>> lsi.add_item( "This is a turtle.", :turtle )
> => nil
>>> lsi.add_item( "This is a cuckoo.", :cuckoo )
> ArgumentError: wrong number of arguments (1 for 0)
>         from 
> /usr/local/lib/ruby/gems/1.8/gems/classifier-1.3.0/lib/classifier/lsi/content_node.rb:37:in 
> `initialize'
> ...
> 
> i.e., I get these "wrong number of arguments" errors as soon as I try to 
> add more than one item.
> 
> Any idea about this?
> 
> 
> Logan Capaldo wrote:
>> On 3/28/07, Ryo Fojiba <fojiba@gmail.com> wrote:
>>>
>> Didja try
>> require 'rubygems'
>> require 'classifier'
>> 
>> ?


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