Help with postscript (huge file size)
Do you mean you're importing jpegs or other bitmaps into R and writing them out (possibly with annotation etc.) as PostScript? Can you give a small example of some sort? It would help for giving advice.
Talita Perciano wrote:
Thank you for the answer. Just to clear things out, I'm generating plots of rgb images. Talita 2009/4/11 Ben Bolker <bolker at ufl.edu<mailto:bolker at ufl.edu>> Talita Perciano wrote:
Dear users, I'm generating some images in R to put into a document that I'm producing using Latex. This document in Latex is following a predefined model, which does not accept compilation with pdflatex, so I have to compile with latex -> dvi -> pdf. Because of that, I have to generate the images in R with postscript (I want a vector format to keep the quality). The problem is that the files of the images are very huge (10MB) and I have many images to put into the pdf document. I want to know if there is a way to reduce the size of those images generated by R using postscript. Thank you in advance, Talita
Not in any extremely easy way. The fundamental problem is that if you have a whole lot of points in your graph, it's hard to make them take less file space even if they're overplotted (and hence not visible in the actual image). This has been discussed in various forms on the R list in the past, but I can't locate those posts easily. It's a little hard without knowing what kind of plot you're generating, but I'm assuming that you have many, many points or lines in the graphic (or a very high-resolution image plot), and that the details don't all show up in the figure anyway. A few general strategies: * thin the points down to a random subset * use a 2D density plot or hexagonal binning * create a bitmap (PNG) plot, then use image manipulation tools (ImageMagick etc.) to convert that back to a PostScript file * there was some discussion earlier about whether one could embed a bitmap of just the internals of the plot, leaving the axes, labels etc. in vector format, but I don't think that came to anything good luck Ben Bolker -- View this message in context: http://www.nabble.com/Help-with-postscript-%28huge-file-size%29-tp23003428p23004309.html Sent from the R help mailing list archive at Nabble.com.
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Ben Bolker Associate professor, Biology Dep't, Univ. of Florida bolker at ufl.edu / www.zoology.ufl.edu/bolker GPG key: www.zoology.ufl.edu/bolker/benbolker-publickey.asc -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 260 bytes Desc: OpenPGP digital signature URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20090411/02d62851/attachment-0002.bin>