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

From: Wolfgang Huber <whuber_at_embl.de>
Date: Sat, 16 Jan 2010 19:08:32 +0100


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?

[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

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