>>>>> Thierry Onkelinx via R-devel
>>>>> on Tue, 20 Nov 2018 14:16:20 +0100 writes:
> Dear all, When running R CMD check on our package, we get
> an error on the examples.
> Error in grDevices::dev.off() :
> cannot shut down device 1 (the null device)
> None of the examples in our package generates
> plots. grDevices::dev.off() is code added by R CMD
> check.
Yes, but there's also code added at the very beginning of the
examples R script ( <pkg>-Ex.R ) which opens a pdf device:
grDevices::pdf.options(width = 7, height = 7, paper = "special", reset = TRUE)
grDevices::pdf(paste(pkgname, "-Ex.pdf", sep=""), encoding = "ISOLatin1")
and so things should work and do work well for packages without any plots.
You must be doing something particularly strange in some of *your*
examples such as closing all existing devices -- something you should not do:
As a good citizen you close graphic devices that you open but not others.
> A workaround is to have at least one example which
> has some plot. Is there a better solution?
Yes, find the example in your package which does the above
"strange thing" and modify that.
Best,
Martin Maechler
ETH Zurich and R Core Team
> We are using R 3.5.1
> Best regards,
> ir. Thierry Onkelinx Statisticus / Statistician
> Vlaamse Overheid / Government of Flanders INSTITUUT VOOR
> NATUUR- EN BOSONDERZOEK / RESEARCH INSTITUTE FOR NATURE
> AND FOREST Team Biometrie & Kwaliteitszorg / Team
> Biometrics & Quality Assurance thierry.onkel...@inbo.be
> Havenlaan 88 bus 73, 1000 Brussel www.inbo.be
>
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> examination: he may be able to say what the experiment
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> is not data. ~ Roger Brinner The combination of some data
> and an aching desire for an answer does not ensure that a
> reasonable answer can be extracted from a given body of
> data. ~ John Tukey
>
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