On Fri, 1 Sep 2006, Hans-Peter wrote: > Hi, > > I output multiple "grid-package-based" plots to the postscript device. > Because the graphics are complicated and consists of a lot of datapoints > (~200'000) the files become really big. To avoid this big files and to > shorten the creation, I currently print the plots to the png device and > manually combine them into one multipaged pdf document. > > My question is, it is possible to do this in R directly? > Probably I would have to create a png plot first, then reimport it into R > and "put" it on the ps device. Is this a realistic way (in principle) ? > > If there is no package to read png files (I didn't find anything), I > probably could solve this.
There are various ways to do so: one is to convert to a format pixmap knows, another to convert to TIFF and use rtiff. > But I still don't know if it would be possible to > "put" this memory representation to a ps device. Only crudely. There is nothing in the R graphics model related to bitmaps. What you could do is draw each pixel as a rectangle (as image() does), but then your file size will be even bigger and the chances of it being rendered accurately are not high. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-help@stat.math.ethz.ch 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.
