[R] groupedData function not found

[Andrew Robinson]

Hi Andrea,

did you try

require(nlme)

?  Adding a package is not necessarily the same as loading it.

Cheers

Andrew


On Thu, Dec 27, 2007 at 10:42:27PM +0000, andrea previtali wrote:
> 
> Hello,
> I'm trying to use the groupedData function and R is giving me the message: Error: can not find function "groupedData"
> The code is coming from a textbook so I think it should be correct:
> 
> pigs<-data.frame(cbind(pig.time,pig.id,pig.wt))
> pig.growth<-groupedData(pig.wt~pig.time|pig.id,data=pigs)
> 
> I have added the package "nlme" and to confirm that it was installed correctly I requested the list of functions included in the package (library(help=nlme)) and I do see groupData in the list.
> I am using R 2.6.1 in Windows XP.
> 
> I'll appreciate your help.
> Thanks,
> Andrea Previtali
> Post-doc fellow
> Dept. of Biology,
> Univ. of Utah, SLC, UT.
> 
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-- 
Andrew Robinson  
Department of Mathematics and Statistics            Tel: +61-3-8344-9763
University of Melbourne, VIC 3010 Australia         Fax: +61-3-8344-4599
http://www.ms.unimelb.edu.au/~andrewpr
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