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2011 Sep 03
1
Problem with by statement for spaghetti plots
Hi, I am trying to apply the example at the bottom of the following page to my own data: http://128.97.141.26/stat/R/faq/spagplot.htm http://128.97.141.26/stat/R/faq/spagplot.htm The code from the example is: /tolerance<-read.table("http://www.ats.ucla.edu/stat/R/faq/tolpp.csv",sep=",", header=T) fit <- by(tolerance, tolerance$id,function(x) fitted.values(lm(tolerance ~ time, data=x))) fit1 <- unlist(fit) names(fit1) <- NULL interaction.plot(tolerance$age, tolerance$id, fit1,xlab="time", ylab="tolerance", legend=F)/ Here...