You might want to look at the summaryBy function in the doBy package summaryBy(varname ~ zip, data=DATA,FUN=c(mean,median)
David Freedman Mike ! wrote: > > > > I've got a data frame having numerical data by zip code: > > ZIP DATA > 94111 12135.545 > 93105 321354.65654 > 94111 545.555 > 94706 558858.66 > ... ... > > I'm using this function to group records by ZIP and calculate the median > of DATA: > > aggregate(d$DATA, list(Zip = d$ZIP), FUN=median, na.rm=T) > > but what I really want to do is to calculate several statistics (median, > mean, etc.) for each group of records, so that I'll get a result organized > like: > > Zip median(DATA) mean(DATA) > 94706 565 555 > 94111 59585 66666 > 93105 595685 5555666 > ... > > I tried using FUN=funstofun(median,mean), but found that doesn't work in > aggregate. Is there a straightforward way to do what I'm after (I'm > pretty new to R)? thanks > _________________________________________________________________ > Change the world with e-mail. Join the i’m Initiative from Microsoft. > > ld > ______________________________________________ > 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. > > -- View this message in context: http://www.nabble.com/aggregate%28%29%2C-with-multiple-functions-in-FUN--tp17275892p17297580.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.
