Do you mean IQR? -- I don't know what ICR means. If so, see IQR. More generally see ?by or more generally ?tapply to obtain whatever sort of summary you want.
e.g. > d <-data.frame( x = runif(10), w = rep(c("a","b"),5)) > by(d$x, d$w, FUN = function(x)c(median = median(x),IQR = IQR(x))) d$w: a median IQR 0.5469662 0.4548506 -------------------------------------------------------------- d$w: b median IQR 0.6860975 0.3456893 -- Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Mon, Dec 23, 2019 at 9:15 AM Medic <mailipadp...@gmail.com> wrote: > I have > mydata$var > #this is ONE group of patients > > And I would like to get > median and ICR of mydata$var. > > How can I get this? > With summary (mydata$var)! > > Ok! > > And now I would like to get THE SAME, but for TWO group: male and > female (which are contained in the group mydata$var) > > How can I get this? > First I need to split mydata$var by mydata$sex, and then take: > > summary (for male) > and > summary (for female) > > That's all I want > > Bert, > ave(mydata$var, madata$sex, FUN=median) > gives me: > [1] 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 > 5.6 5.6 5.6 5.6 > [21] 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 > 6.0 6.0 6.0 6.0 > What is it? > It is an endless(???) repetition of the median. > Moreover, there is no ICR. > > Jeff, > your constructions are too complicated for me > === > P.S. Such simple thing and so difficult?! (I begin think about the Excel.) > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.