<<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. R 2.8 --please do not edit the information below-- Version: platform = i386-apple-darwin8.11.1 arch = i386 os = darwin8.11.1 system = i386, darwin8.11.1 status major = 2 minor = 8.1 year = 2008 month = 12 day = 22 svn rev = 47281 language = R version.string = R version 2.8.1 (2008-12-22) GUI: R-GUI 1.27 (5301) Locale: en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 Search Path: .GlobalEnv, tools:RGUI, package:stats, package:graphics, package:grDevices, package:utils, package:datasets, package:Rutils, package:methods, Autoloads, package:base
Could you explain what you are seeing that is wrong?
In R 2.7.2, which is what I have here, it looks ok, and the NEWS file
doesn't list any changes since 2.7.1.
-thomas
On Wed, 4 Mar 2009 rhafen at 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.
>
> R 2.8
>
> --please do not edit the information below--
>
> Version:
> platform = i386-apple-darwin8.11.1
> arch = i386
> os = darwin8.11.1
> system = i386, darwin8.11.1
> status > major = 2
> minor = 8.1
> year = 2008
> month = 12
> day = 22
> svn rev = 47281
> language = R
> version.string = R version 2.8.1 (2008-12-22)
>
> GUI:
> R-GUI 1.27 (5301)
>
> Locale:
> en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
>
> Search Path:
> .GlobalEnv, tools:RGUI, package:stats, package:graphics,
> package:grDevices, package:utils, package:datasets, package:Rutils,
> package:methods, Autoloads, package:base
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
Thomas Lumley Assoc. Professor, Biostatistics
tlumley at u.washington.edu University of Washington, Seattle
rhafen at 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).> > R 2.8 > > --please do not edit the information below-- > > Version: > platform = i386-apple-darwin8.11.1 > arch = i386 > os = darwin8.11.1 > system = i386, darwin8.11.1 > status > major = 2 > minor = 8.1 > year = 2008 > month = 12 > day = 22 > svn rev = 47281 > language = R > version.string = R version 2.8.1 (2008-12-22) > > GUI: > R-GUI 1.27 (5301) > > Locale: > en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 > > Search Path: > .GlobalEnv, tools:RGUI, package:stats, package:graphics, > package:grDevices, package:utils, package:datasets, package:Rutils, > package:methods, Autoloads, package:base > > ______________________________________________ > R-devel at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel-- O__ ---- Peter Dalgaard ?ster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
Berwin A Turlach wrote:> G'day Peter, > > On Thu, 05 Mar 2009 09:09:27 +0100 > Peter Dalgaard <p.dalgaard at biostat.ku.dk> wrote: > >> rhafen at 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 at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-develPlease 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. Uwe Ligges
Uwe Ligges wrote:> Berwin A Turlach wrote: > >> G'day Peter, >> >> On Thu, 05 Mar 2009 09:09:27 +0100 >> Peter Dalgaard <p.dalgaard at biostat.ku.dk> wrote: >> >> >>> rhafen at 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 at 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