Hi Corey, Thanks so much for this. However, I get this error for tapply - "Error in tapply(RT, RT$R, fun=WA): arguments must have same length". Any idea how to get around this?
Thanks again, Raoul -- View this message in context: http://r.789695.n4.nabble.com/Calculating-Summaries-for-each-level-of-a-Categorical-variable-tp2269349p2269815.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.
