[Rd] bug (PR#13570)

[Mark Difford]

Hi Uwe,

This is not a problem under Vista, using "a" development version (mine now
somewhat outdated).

Regards, Mark.

sessionInfo()
R version 2.9.0 Under development (unstable) (2009-01-22 r47686) 
i386-pc-mingw32 

locale:
LC_COLLATE=English_South Africa.1252;LC_CTYPE=English_South
Africa.1252;LC_MONETARY=English_South
Africa.1252;LC_NUMERIC=C;LC_TIME=English_South Africa.1252

attached base packages:
[1] splines   stats     graphics  grDevices utils     datasets  methods  
base     

other attached packages:
[1] ade4_1.4-10     Design_2.1-2    survival_2.34-1 Hmisc_3.5-2    

loaded via a namespace (and not attached):
[1] cluster_1.11.12    gamlss_1.9-4       grid_2.9.0         lattice_0.17-20   
latticeExtra_0.5-4
[6] MASS_7.2-45        tools_2.9.0 


Uwe Ligges-3 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.
> 
> Uwe Ligges
> 
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
> 
> 

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