Can somebody tell me how to do the equivalent of a pivot table in R ?
For example, if I have : var1 var2 var3 a x 10 b y 20 a z 10 b z 20 a z 10 b z 20 I could have : x y z a 1 0 2 b 0 1 2 where entries in the table are counts of var3. x y z a 10 0 20 b 0 20 40 where entries are sums of var3. I would expect it to be tapply(), but I can't see how it would be done. Any suggestions please. -- View this message in context: http://www.nabble.com/Equivalent-of-Excel-pivot-tables-in-R-tp16906289p16906289.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.