Re: Re: [Classifier4j-devel] Training and Classifying

[<np...@nt...>]

Hi Nick,

The problem I am having is as follows:

I wish to classify an unknown article against trained data, which is in the "word_probability" table.

So, to do this I must use BayesianClassifier as follows:

	1. Create an instance of JDBCWordsDataSource
	2. Create a new instance of BayesianClassifier, passing the JDBCWordsDataSource to the constructor
	3. Call BayesianClassifier.classify(String)

However, by creating an instance of JDBCWordsDataSource (1), the constructor for this method creates a new table. 
------ which I do not want because I will have to delete the table containing all my trained data.

What I want is to be able to retrieve my trained data (in a JDBCWordsDataSource??), then classify the new article against this data.

How can I do this?  I would very much appreciate some sample code.

Regards

Nigel









> 
> From: Nick Lothian <ni...@ma...>
> Date: 2004/05/15 Sat PM 01:24:43 GMT
> To: cla...@li...
> Subject: Re: [Classifier4j-devel] Training and Classifying
> 
> 
> Are you referring to the Trainer.java & Analyser.java in the 
> net.sf.classifier4J.demo package? If so then these are intended as a 
> demo only (and a pretty old one at that).
> 
> Classifier4J supports training directly via the teachMatch method (see 
> http://classifier4j.sourceforge.net/xref/net/sf/classifier4J/bayesian/BayesianClassifier.html#193).
> 
> That supports data persistence via the IWordsDataSource interface, 
> in-particular the JDBCWordsDataSource 
> <../../../../net/sf/classifier4J/bayesian/JDBCWordsDataSource.html> 
> implementation of it.
> 
> Nick
> 
> np...@nt... wrote:
> 
> >Hi,
> >
> >I would like to use Classifier4J to input "good" and "bad" articles; then 
> >provide the system with a new article for classification.
> >
> >Using Trainer.java I can input my articles into a table.  However, how do I continue adding articles to the table?
> >The following line in Trainer.java always creates a new table, I would like to continue adding to an existing table:
> >
> >JDBCWordsDataSource wds = new JDBCWordsDataSource(cm);
> >
> >I have a similar problem with Anayser.java.  I would like the new article to be 
> >classified against the table built from Trainer.java.  However, the 
> >setupClassifier method in Analyser.java always creates a new table.
> >
> >I would very much appreciate any advice.
> >
> >Regards
> >
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