I haven't looked at the detail, but I guess the answer is that mean works on a data frame while median doesn't. -------- ?mean <snip> For a data frame, a named vector with the appropriate method being applied column by column. ---------
I guess to use median you'll need nested '[l/s]apply's, the outer working through the list of dataframes and the inner working through the columns of each dataframe. Or perhaps, by analogy with mean.data.frame you could just define --------- median.data.frame <- function(x, ...) sapply(x, median, ...) ------------ I haven't tried it, but it might work hth Keith J ----------------- "Ptit_Bleu" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > > Unfortunately, I have the same error message. > lapply(rowsplit, function(x)mean(x[,sapply(x, is.numeric)])) works but not > with median. > Strange, isn't it? > > Any other idea? > > Thanks in advance, > Ptit Bleu. > > > Henrique Dallazuanna wrote: >> >> Try this: >> >> lapply(l, function(x)median(x[,sapply(x, is.numeric)])) >> >> >> -- >> Henrique Dallazuanna >> Curitiba-Paraná-Brasil >> 25° 25' 40" S 49° 16' 22" O >> >> [[alternative HTML version deleted]] >> >> >> ______________________________________________ >> 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/sapply-and-median%2C-possible-or-not---tp20378222p20378663.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. > ______________________________________________ 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.
