groupe averages error
From: "Charles Raux" <Charles.Raux at let.ish-lyon.cnrs.fr> To: <r-help at stat.math.ethz.ch> Date: Fri, 24 Nov 2000 10:41:29 +0100 Subject: [R] groupe averages error
I want to get subsets averaged on numeric variables number 5:13 but I get the error below that I cannot understand.
is.factor(dat$Statut)
[1] TRUE
s<-ave(dat[,5:13],dat$Statut)
Error in [<-.data.frame(*tmp*, , value = if (n) { :
Argument "i" is missing, with no default
Nor can I, but then I don't have your data, nor the result of traceback()
(which can be *very* helpful). However, ave() does not apply to
dataframes, and its help page says
Usage:
ave(x, ..., FUN = mean)
Arguments:
x: A numeric.
I think you probably need to use by()
dat <- as.data.frame(matrix(rnorm(1300), 100)) dat$Statut <- factor((0:99)%/%10) by(dat[,5:13],dat$Statut, function(x) sapply(x, mean))
for example.
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._