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 <bol...@ufl.edu<mailto:bol...@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. > > ______________________________________________ > R-help@r-project.org<mailto:R-help@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. > > > > -- > Talita Perciano > Instituto de Matemática e Estatísitca > Universidade de São Paulo - USP > PhD Student in Computer Science > São Paulo, SP, Brazil > Tel: +55 11 8826 7092 > > "Success is not final, failure is not fatal: it is the courage to continue > that counts." > (Winston Churchill) > -- Ben Bolker Associate professor, Biology Dep't, Univ. of Florida bol...@ufl.edu / www.zoology.ufl.edu/bolker GPG key: www.zoology.ufl.edu/bolker/benbolker-publickey.asc
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