[R] Problem with colormodel in pdf driver
Prof Brian Ripley
ripley at stats.ox.ac.uk
Sat Jan 24 07:54:45 CET 2009
'gray' is what is in the code: 'grey' uses rgb -- just look at the pdf
produced.
The issue is that the wrong ('stroke' not 'fill') colour is set in ht
'gray' colormodel.
On Fri, 23 Jan 2009, David Winsemius wrote:
> Try changing the color to "grey".
>
> Despite the help pages saying this:
> colormodel
> a character string describing the color model: currently allowed values are
> "rgb", "gray" and "cmyk". Defaults to "rgb".
>
> I got the expected behavior by making the "gray" -> "grey" change on my Mac
> OS 10.5.6/R2.8.1 system.
>
> --
> David Winsemius
> On Jan 23, 2009, at 7:21 PM, Luis Torgo wrote:
>
>> I'm trying to create figures in PDF that use the 'gray' colormodel instead
>> of the default 'RGB' model, by requirements of a publisher.
>>
>> My problem has to do with the fact that I'm not being able to get gray
>> colors with this option on the pdf() driver. Here is a small example for
>> problem replication:
>>
>>> R.version
>> _ platform i486-pc-linux-gnu
>> arch i486 os linux-gnu
>> system i486, linux-gnu 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)
>>
>>> pdf('exp.pdf',colormodel='gray')
>>> barplot(table(subset(iris,Petal.Width>1)$Species))
>>> dev.off()
>>
>> Contrary to what I was expecting the bars appear in black and not gray as
>> they are supposed to. This is not particularly serious for this toy graph
>> but for others it creates more problems.
>>
>> Interesting enough this problem does not occur with the same option on the
>> postscript() driver as it can be observed by running:
>>> postscript('exp.eps',colormodel='gray')
>>> barplot(table(subset(iris,Petal.Width>1)$Species))
>>> dev.off()
>>
>> Any help is most appreciated.
>>
>> Luis Torgo
>>
>> --
>> Luis Torgo
>> FEP/LIAAD - INESC Porto, LA Phone : (+351) 22 339 20 93
>> University of Porto Fax : (+351) 22 339 20 99
>> R. de Ceuta, 118, 6o email : ltorgo at liaad.up.pt
>> 4050-190 PORTO - PORTUGAL WWW : http://www.liaad.up.pt/~ltorgo
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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