Hi Paul

from a user perspective, this sounds reasonable.

         Thank you very much, 
               Wolfgang


Il giorno Jan 28, 2010, alle ore 2:44 AM, Paul Murrell ha scritto:

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@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
p...@stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/

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