Hi Dave, Thanks for your response!
I'm new at R, and I'm afraid I'm not sure what you mean by: ?lapply ?"[" ?order Were these suggestions for other commands to try? If so, can you be more specific? I apologize for being clueless :) Secondly, you're right that the script I have now leaves me with the means from the last column. Do you have any suggestions for how to write the results for each "i" to a unique vector? I was going to try: mean_i <- tapply(x[,i], ID, etc..., but I was thinking that this would just create a vector named "mean_i" w/ results of last column, not a separate vector for each "i". I guess what I want is some command to print the result of each run before repeating with the next "i". Any ideas? Again, thanks for the help. Best, Logan -- View this message in context: http://r.789695.n4.nabble.com/Conditional-Loop-For-Data-Frame-Columns-tp4276821p4277615.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.
