Ben that subset(..) works, and it solves all my problems. thnks!
Ben Bolker wrote: > > > > JoK LoQ wrote: >> >> Just a quickly beginner's question. >> >> I wanna find the mean only from the values from a column related to >> specific values from another one. Like, theres a 'region' column, i want >> the mean of the value on 'profit' column only from "south" sells from >> 'region' column >> > > mean(x[x$region=="south",]$profit) > > or (untested) > > mean(subset(x,region=="south",select=profit)) > -- View this message in context: http://www.nabble.com/Simple-one-tp24329691p24340559.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.
