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. > > ______________________________________________ > R-help@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. > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. -- 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 http://blogs.mbs.edu/fishing-in-the-bay/ ______________________________________________ R-help@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.