There is only one _range_ mentioned, (0, 0.5). I don't see how you can construe 'that range' to be a reference to anything other than (0, 0.5).
And why do you suppose the description for argument 'trim' is referring to 'values' of a different argument? It is telling you what happens for values of trim < 0 or > 0.5: that is not information that it is appropriate to excise. On Thu, 25 Oct 2007, Peter Dalgaard wrote: > 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. > > -- Brian D. Ripley, [EMAIL PROTECTED] 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 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
