Hi, thanks for replying. No, there arent any NA's in the original data set.... I think I must be mis-interpreting the use of lines()? in the example what exactly is "y"? lines(y,exp(tmp[1]+tmp[2])) In my case tmp[1] and tmp[2] are coeficients from the model so just one number (not a vector) and I havent specified y.... Thanks everyone, Simon
> Hi > > not sure but are there some NA values in your data? > > what > > length(mtf) > and > length(fitted(f2)) > > tells you? > > And you need not to use assignment > > graph1 <- plot(....) > > to output a plot on screen. > > > HTH > Petr > > > On 24 Aug 2006 at 13:43, Simon Pickett wrote: > > Date sent: Thu, 24 Aug 2006 13:43:18 +0100 (BST) > From: "Simon Pickett" <[EMAIL PROTECTED]> > To: R-help@stat.math.ethz.ch > Subject: [R] help: trouble using lines() > >> Hi R experts, >> I have been using ReML as follows... >> model<-lmer(late.growth~mtf+year+treat+hatch.day+hatch.day:year+hatch. >> day:treat+ mtf:treat+ treat:year+ year:treat:mtf+(1|fybrood), data > A) >> then I wanted to plot the results of the three way interaction >> using lines() as follows... >> >> tmp<-as.vector(fixef(model)) >> graph1<-plot(mtf,fitted(f2), xlab=list("Brood Size"), ylab=list("Early >> growth rate"), pch=16, col="darkgrey", bg="yellow") >> lines(y,exp(tmp[1]+tmp[2])) >> >> but no matter what I try I always get the error message >> "Error in xy.coords(x, y) : 'x' and 'y' lengths differ" >> >> Can anyone shed some light please? >> I am basically copying the methods of the pdf entitled "Linear mixed >> models in R" by Søren Feodor Nielsen 20003. >> http://cran.r-project.org/doc/contrib/Fox-Companion/appendix-mixed-mod >> els.pdf#search=%22Linear%20mixed%20models%20in%20R%22 >> >> >> >> >> >> Simon Pickett >> PhD student >> Centre For Ecology and Conservation >> Tremough Campus >> University of Exeter in Cornwall >> TR109EZ >> Tel 01326371852 >> >> ______________________________________________ >> R-help@stat.math.ethz.ch 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. > > Petr Pikal > [EMAIL PROTECTED] > > Simon Pickett PhD student Centre For Ecology and Conservation Tremough Campus University of Exeter in Cornwall TR109EZ Tel 01326371852 ______________________________________________ R-help@stat.math.ethz.ch 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.