From: Jaypee <rf.oodanaw@...>
Date: 2005-04-20T03:39:33+09:00
Subject: Re: [ANN] Bishop 0.3.0 - bayesian classifier for Ruby ported from Python

Matt Mower a �crit :
> Hi Jean-Pierre,
> 
> On 4/18/05, Jaypee <rf.oodanaw@sd.eepyaj> wrote:
> 
>>Thank you for this useful librbary.
> 
> 
> You're welcome.
> 
> 
>>I am trying to use it to analyse the project of text for the european
>>constitution (Is it social? liberal? respectful of human rights?) 
>>[..snip..]
>>I'd like to know what the behaviour of the training of a classifier is
>>when two different set of words are submitted in two successive "train"
>>method invocations for a given category. Does the second invocation
>>resets the training or does it accumulate the "experience" progressively.
>>
> 
> 
> You're right when you say it accumulates.  Further training supplies
> more evidence to the classifier about which words are associated with
> which categories .  It uses this evidence to work out conditional
> probabilities which are then combined to make a guess about the
> approriate category for an item.
> 
> There is an #untrain method if you want to remove previously trained
> information.
> 
> Regards,
> 
> Matt
> 
Thank you,
Jean-Pierre