Liaw, Andy wrote: > (I see this in both R-patched r43124 and R-devel r43233.) > In the Argument section of ?mean: > > trim the fraction (0 to 0.5) of observations to be trimmed from each > end of x before the mean is computed. Values outside that range are > taken as the nearest endpoint. > > Then in the Value section: > > If trim is non-zero, a symmetrically trimmed mean is computed with a > fraction of trim observations deleted from each end before the mean is > computed. > > The description in "trim" to me sounds like Windsorizing, rather than > trimming. Should that be edited? > > I think so:
> x <- sort(rnorm(10)) > mean(x,trim=.1) [1] -0.6387413 > mean(x[2:9]) [1] -0.6387413 > mean(x[c(2,2:9,9)]) # Winsorizing [1] -0.6204222 So yes, it is trimming, not Winsorizing, and the last sentence in the description of "trim" is misleading and should be, well..., trimmed. -- O__ ---- Peter Dalgaard Ă˜ster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel