Hi all,
I wonder how could I convert a matrix A to a dataframe such that whenever I'm running a linear model such lme, I can use A$x1? I tried data.frame(A), it didn't work. Should I initialize A not as a matrix? Thanks. Yen Lin [[alternative HTML version deleted]] ______________________________________________ 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