Hello there, Using 'The R Book' (p675-677) I am following instructions on performing a series of nonlinear regressions fitting the same model to a set of groups. I have been to able to fit the model to my data using the following call to nlme: >library(nlme) >inorg.model<-nlme(inorg.grv ~ a*exp( - ((numDate-b)^2 / 2*c^2)), fixed=a+b+c~1, random=a~1|Sectionf, start=c(a=adi,b=bdi,c=cdi), verbose = TRUE)
Now, again following the R book, I would like to plot these models using augPred. However I receive the following error: >plot(augPred(inorg.model)) Error in augPred.lme(inorg.model) : Data in inorg.model call must evaluate to a data frame I am not sure even how to diagnose this problem. I basically followed to R book directions to the letter. I could plot each of these curves from each out individually but the prospect of R doing it all for me is too tempting. I am using R 2.8.1-1 and Ubuntu 9.04. Thanks in advance! Sam -- ***************************************************** Sam Albers Geography Program University of Northern British Columbia 3333 University Way Prince George, British Columbia Canada, V2N 4Z9 phone: 250 960-6777 ***************************************************** [[alternative HTML version deleted]] ______________________________________________ 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.