Re: [Classifier4j-devel] Several questions regarding Classifier4J

[Benjamin P. <ben...@we...>]

br...@bj... wrote:

>>- Are there any open-source examples available that use classifier4j?
>>    
>>
>
>I'm using Classifier4J as a spam email classifier in my
>Webgate software (see http://webgate.sourceforge.net). 
>  
>
Thanks, going to have a look at it.

>  
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>>- Is there any support of storing the ratings in a file and 
>>reload it on next JVM startup (some sort of
>>  Serialisation)?
>>    
>>
>
>I don't know the answer to this.  From my dealings with it,
>all results are stored in a database.
>  
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So what kind of database are you using? Is it a real database
that is running on a server, or some sort of file-based DB?

>  
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>>- Is it possible to have a better rating granularity than 
>>just match and not match? I thought of something like
>>   5 rating levels that a news may be rated (very good, good, 
>>moderate, bad, very bad).
>>    
>>
>
>Well - the matching returns a percentage match I think.  So
>you could test the returned result and say, for example.. that
>a 0-.2 would be very good, .2-.4 good, .4-.6 moderate, etc.
>  
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Well I am talking of the other way, giving good or moderate as
input into classifier4j. Using trainMatch and trainNonMatch
this does not seem to be possible.

>  
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>>- How do I train the system. With using 
>>classifier.teachMatch()... or with using the WordProbability class?
>>    
>>
>
>I used teachMatch() and teachNonMatch() (i think thats the correct
>method name) against known good and bad emails in my inbox.
>  
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Yeah those sound good, but as mentioned I dont think it will be possible
to use them when using 5 rating levels. For a Spam filter with only
two levels Spam / Ham its sufficient.

Ben

>Hope this helps!
>
>- Brent
>
>
>
>
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