Re: [R] Discriminant function analysis

From: Tyler Smith <tyler.smith_at_mail.mcgill.ca>
Date: Wed, 6 Feb 2008 20:00:54 +0000 (UTC)

On 2008-02-06, Birgit Lemcke <birgit.lemcke_at_systbot.uzh.ch> wrote:

>

> I am using R 2.6.1 on a PowerBook G4.
> I would like to perform a discriminant function analysis. I found lda
> in MASS but as far as I understood, is it only working with
> explanatory variables of the class factor.

I think you are mistaken. If you reread the help for lda() you'll see that the grouping has to be a factor, but the explanatory variables should be numeric.

> My dataset contains variables of the classes factor and numeric. Is
> there another function that is able to handle this?

The numeric variables are fine. The factor variables may have to be recoded into dummy binary variables, I'm not sure if lda() will deal with them properly otherwise.

HTH, Tyler



R-help_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Wed 06 Feb 2008 - 20:05:08 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Thu 07 Feb 2008 - 11:30:11 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive