R help - Sep 2009 - How to do a PCA with ordered variables?

Hi,

I want to do a pca using a set of variables which are ordered. I have used
the dudi.mix method from the ade4 package, but when I do the $index it shows
me that R has considered my variables as quantitative.

What should I do?
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P. Branco wrote:
>> I have used the dudi.mix method from the ade4 package, but when I do
the
>> $index it shows 
>> me that R has considered my variables as quantitative. 
>> What should I do?
You should make sure that they are encoded as ordered factors, which has
nothing to do with ade4's dudi.mix().

##
?ordered

Mark.



P.Branco wrote:
> 
> Hi,
> 
> I want to do a pca using a set of variables which are ordered. I have used
> the dudi.mix method from the ade4 package, but when I do the $index it
> shows me that R has considered my variables as quantitative.
> 
> What should I do?
> 
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View this message in context:
http://www.nabble.com/How-to-do-a-PCA-with-ordered-variables--tp25491950p25491969.html
Sent from the R help mailing list archive at Nabble.com.