[R] candisc() error message

[John Fox]

Dear Tanya,

If I follow correctly what you're trying to do, you're in effect doing a
one-way MANOVA of 17 response variables on a six-level factor, with only 20
observations. That's not enough data. I'm copying to Michael Friendly in
case he hasn't seen your posting and would like to comment.

Regards,
 John

------------------------------
John Fox, Professor
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
web: socserv.mcmaster.ca/jfox


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
> Behalf Of Tanya Yatsunenko
> Sent: June-15-08 8:23 PM
> To: r-help at r-project.org
> Subject: [R] candisc() error message
> 
> Hi,
> I am doing canonical discriminant analysis using candisc function from
> the candisc package.
> My input is a table of species distribution (columns = abundance of each
> species in each sample)  in samples that are split by categories (rows),
> and I want to know whether each category is associated with a particular
> set of species and their abundances.
> I have 20 rows (samples) split into 6 categories, and 17 columns
(species).
> 
> I am getting the following error message, which I don't understand:
> 
>  > can<-candisc(mod, data=canIN)
> Error in linear.hypothesis.mlm(mod, hyp.matrix.2, SSPE = SSPE, V = V,  :
>   The error SSP matrix is apparently of deficient rank = 16 < 17
> 
> Does anyone has any experience in candisc?
> 
> --
> Tanya.
> 
> 
> 	[[alternative HTML version deleted]]
> 
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