> Try summaryBy in package doBy. e.g. using the built in dataset CO2: > > summaryBy(uptake ~ Plant, CO2, FUN = c(mean, min, max))
Or with reshape with a little more work: cm <- melt(CO2, id=1:4) cast(cm, Type ~ Treatment, c(min,mean,max)) but you get some extra flexibility: cast(cm, result_variable + Type ~ Treatment, c(min,mean,max)) cast(cm, Type ~ Treatment ~ result_variable, c(min,mean,max)) cast(cm, Type + Treatment ~ result_variable, c(min,mean,max)) Regards, Hadley ______________________________________________ [email protected] 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.
