Hello, I have a large dataset of the form subj var1 var2 001 100 200 001 120 226 001 130 238 001 140 245 001 150 300 002 110 205 002 125 209 003 101 233 003 115 254
I would like to perform linear regression of var2 on var1 for each subject separately. It seems like I should be able to use the tapply function as you do for simple operations (like finding a mean of var1 for each subject), but I am not sure of the correct syntax for this. Is there a way to do this? Many thanks, Marcel -- View this message in context: http://r.789695.n4.nabble.com/linear-regression-in-a-ragged-array-tp3393033p3393033.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
