[R-SIG-Mac] Bug Report

[Simon Urbanek]

Richard,

thanks for the report. The issue is known and the only (known) cure  
lies in R-devel's new Quartz.
It seems to be triggered by concurrency - e.g. on my machine your  
example produces five equal and correct PDF plots without problems -  
hence it occurs more often on slower machines. You may find several  
post about this bug on this mailing list and some suggestions on how  
to deal with it (adding delays before saving, preventing output and  
probably in your case not starting new devices each time).

Cheers,
Simon

On Feb 13, 2008, at 7:40 AM, Richard Martin wrote:

> Good Morning,
>
> I believe I have found a bug within R.app. It's a problem with
> quartz.save() which _seems_ to manifest itself when using par(mfcol)
> to create multi-window graphs (and hence affects topology plots etc).
>
> I have created a script which will repeat the bug _most_ of the time.
>
> for(i in 1:5) {
>
> quartz()
> par(mfcol=c(2,2))
> plot(1:10, type="b")
> plot(1:10, type="b")
> plot(1:10, type="b")
> plot(1:10, type="b")
> quartz.save(paste(i, ".pdf"), type="pdf")
>
> }
>
> EXPECTED OUTCOME: 5 files, named 1.pdf to 5.pdf, containing 4 graphs.
> Each pdf should be identical.
> ACTUAL OUTCOME: The pdf files are most often not equal. Sometimes
> individual plots are left off the graphs (such that 1.pdf contains
> only 2 or 3 plots, for example). More seriously, in some instances
> console text is superimposed in a translated manner over the graphs
> themselves. This can be seen in the attached pdf.
>
> R version information follows:
>
>> R.Version()
> $platform
> [1] "i386-apple-darwin8.10.1"
>
> $arch
> [1] "i386"
>
> $os
> [1] "darwin8.10.1"
>
> $system
> [1] "i386, darwin8.10.1"
>
> $status
> [1] ""
>
> $major
> [1] "2"
>
> $minor
> [1] "6.2"
>
> $year
> [1] "2008"
>
> $month
> [1] "02"
>
> $day
> [1] "08"
>
> $`svn rev`
> [1] "44383"
>
> $language
> [1] "R"
>
> $version.string
> [1] "R version 2.6.2 (2008-02-08)"
>
> R.app version information:
> R 2.6.2 GUI 1.23 (4932) (4932)
>
> Mac Information:
> Version 10.5.2, build 9C31
>
> If you have any idea how to work around this bug, I'd be most
> greatful. If you need any more information or I can help in any way,
> please email.
>
> Kind Regards,
>
> Richard Martin
> Research Officer,
> University of Essex,
> Colchester,
> Essex,
> CO4 3SQ
>
>
> -- 
> Contendere, Explorare, Invenire, et non Cedere
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