On Tue, 2003-09-23 at 16:00, Ken Williams wrote:
> On Tuesday, September 23, 2003, at 02:21 AM, Dominique Vlieghe wrote:
>
> > Hi,
> >
> > I was wondering whether the NaiveBayes Modules (AI::NaiveBayes1 and
> > Algorithm::NaiveBayes) are capable of handling numerical attributes. A
> > first glance on the code tells me they are not. Is this so and if yes,
> > does anyone have an alternative package? Are there any plans to
> > introduce numerical attributes in the modules?
>
> Algorithm::NaiveBayes uses numerical attributes:
>
> $nb->add_instance
> (attributes => {foo => 1.7, bar => 3.234},
> label => 'whatever');
>
> Or do I misunderstand your question?
I think you do, what I mean is that it should create some sort of
distribution (e.g. a normal distribution) of the values of a given
attribute. The naive bayes modules will (if I'm not mistaken) count the
number of occurrences of a (numeric or not) attribute e.g. in your
example you will have 1 times 1.7 and 1 times 3.234.
In weka for example the nature of the attribute is determined by the
input file: either discrete or numeric.
--
------------------------------
Dominique Vlieghe, Ph.D.,
Bioinformatics Core,
Department for Molecular Biomedical Research (DMBR)
VIB - Ghent University
(new) 'Fiers-Schell-Van Montagu' building
(new) Technologiepark 927
(new) B-9052 Ghent (Zwijnaarde), Belgium
(new) Tel : +32-(0)9-33-13.693
(new) Fax : +32-(0)9-33-13.609
(new) email:[EMAIL PROTECTED]
(new) www:http://www.dmbr.ugent.be/
------------------------------
