[R] lme, spline

[Joris Meys]

On Tue, Jun 15, 2010 at 9:47 AM, Farhad Shokoohi <statfar at gmail.com> wrote:
> Dear All,
> I have a problem running this program on R. Z is a  matrix of spline which is random
>> fit<-lme(anc~X,random=pdIdent(~Z))
> Error in getGroups.data.frame(dataMix, groups) :
>  Invalid formula for groups
> What I have done wrong?
You didn't read the posting guide.  http://www.R-project.org/posting-guide.html
A little more information on the data is necessary. Please provide
minimal, self-contained, reproducible code that mimicks the error.

This said, I do not understand what you want to do with
"random=pdldent(~Z)". I cannot find a function pdldent, so this
notation doesn't make any sense.

Cheers
Joris

>
> ______________________________________________
> 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.
>



-- 
Joris Meys
Statistical consultant

Ghent University
Faculty of Bioscience Engineering
Department of Applied mathematics, biometrics and process control

tel : +32 9 264 59 87
Joris.Meys at Ugent.be
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