Re: Best way to classify...

yep; hard to say how well my multiclass, one-level sorter works yet.
having various bugs. four those four, a two-level tree like david
suggests should work well.

On Tue, Apr 7, 2009 at 11:07 PM, Paolo <[email protected]> wrote:
> On Tue, Apr 07, 2009 at 09:42:54AM -0700, Tracy Reed wrote:
>>
>> Or is it a binary decision sort of thing where I have to build a
>> binary decision tree and consider spam vs ham and of the ham consider
>> ham about cats vs ham about dogs?
>
> check Thomas' article sorter (recent thread) for a multiclass example,
> have a look at the gatling sorter in the example scripts in source for
> another way.
>
>> Is one more accurate than the other?
>
> depends on classifier type and 'glue logic' around it, ie your training
> algo/strategy, beside nature of stuff to classify itself, of course.
> We know 2 classes - binary - works fine, hence an n-classes, n>2,
> binary-tree classifier should work fine. We've limited (reported)
> experience for multiclass cases, and more precisely we're lacking methods
> to measure the performance of such things (we'd need to extend quality
> assessment procedure/figures as were employed for antispam filter
> 'competition' - see spamconference stuff, links on our website).
>
> I suggest you try to implement both way with elementary scripts, and
> different classifiers (ATM if you want to use different classifiers
> you need to go the binary-tree way), and see what you get.
>
>
> HTH
> --
> paolo
>
>
> ------------------------------------------------------------------------------
> This SF.net email is sponsored by:
> High Quality Requirements in a Collaborative Environment.
> Download a free trial of Rational Requirements Composer Now!
> http://p.sf.net/sfu/www-ibm-com
> _______________________________________________
> Crm114-general mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/crm114-general
>

------------------------------------------------------------------------------
This SF.net email is sponsored by:
High Quality Requirements in a Collaborative Environment.
Download a free trial of Rational Requirements Composer Now!
http://p.sf.net/sfu/www-ibm-com