Re: [Rd] "Too many raster images" in devPS.c

From: Paul Murrell <p.murrell_at_auckland.ac.nz>
Date: Thu, 28 Jan 2010 14:44:30 +1300

Hi

Wolfgang Huber wrote:
> Hi,
>
> I am finding the recently added [1] functionality of embedding raster
> images into plots on R devices very useful! Thanks to Paul Murrell and
> others for providing that. I noted that in
> https://svn.r-project.org/R/trunk/src/library/grDevices/src/devPS.c
> a macro is defined: #define MAX_RASTERS 64, and consequently, I get
>
> Error in grid.Call.graphics("L_raster", x$raster, x$x, x$y, x$width,
> x$height, :

> Too many raster images
>
> even for relatively innocent graphics, such as extensions of [2] (which
> I made with Bioconductor's "splots" package). Besides that, I imagine
> that raster images could be useful as 'glyphs' in various types of plots.
>
> Besides the not so helpful option of patching that macro in my private
> copy of R, is there an intention to extend this functionality to
> accommodate for larger plots more generally?

A simple solution (given the current implementation) would be to allow the user to specify the max number of raster images when starting a PDF file, e.g., ...

pdf("plotwithlotsofimages.pdf", maxRaster=1024)

Would that suffice?

Paul

> [1] http://developer.r-project.org/Raster/raster-RFC.html
> [2] http://www.ebi.ac.uk/~huber/pub/Druggable_ratio_1_before.pdf
>
> Thank you and best wishes,
> Wolfgang
>
> --
> Wolfgang Huber
> EMBL
> http://www.embl.de/research/units/genome_biology/huber/contact
>
> ______________________________________________
> R-devel_at_r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel

-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x85392
paul_at_stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/

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