Uwe Ligges wrote: > Berwin A Turlach wrote: > >> G'day Peter, >> >> On Thu, 05 Mar 2009 09:09:27 +0100 >> Peter Dalgaard <p.dalga...@biostat.ku.dk> wrote: >> >> >>> rha...@stat.purdue.edu wrote: >>> >>>> <<insert bug report here>> >>>> >>>> This is a CRITICAL bug!!! I have verified it in R 2.8.1 for mac >>>> and for windows. The problem is with loess degree=0 smoothing. >>>> For example, try the following: >>>> >>>> x <- 1:100 >>>> y <- rnorm(100) >>>> plot(x, y) >>>> lines(predict(loess(y ~ x, degree=0, span=0.5))) >>>> >>>> This is obviously wrong. >>>> >>> Obvious? How? I don't see anything particularly odd (on Linux). >>> >> Neither did I on linux; but the OP mentioned mac and windows. >> >> On windows, on running that code, the lines() command added a lot of >> vertical lines; most spanning the complete window but some only part. >> >> Executing the code a second time (or in steps) gave sensible >> results. >> >> My guess would be that some memory is not correctly allocated or >> initialised. Or is it something like an object with storage mode >> "integer" being passed to a double? But then, why doesn't it show on >> linux? >> >> Happy bug hunting. If my guess is correct, then I have no idea how to >> track down such things under windows..... >> >> Cheers, >> >> Berwin >> >> ______________________________________________ >> R-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-devel >> > > > Please can you folks try under R-devel (to be R-2.9.0 in a couple of > weeks) and report if you still see it. I do not under R-devel (but do > under R-release), so my guess is that something called by loess() has > been fixed in the meantime. > > Moreover it is not the plot stuff that was wrong under R-2.8.1 (release) > but the loess computations.
I still see it in R-patched (haven't tried R-devel yet). So I think it is worth tracking down and fixing; I'll do it later today. Duncan Murdoch ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
