Dear R developers: The following R program produces a pdf file that does not survive ghostscript distillation correctly. The undistilled version is at http://welch.econ.brown.edu/temp/try.PDF while the distilled version is at http://welch.econ.brown.edu/temp/try.pdf . When previewed, the points are wrong in the distilled .pdf version, but only in one of the two points invokations (huh?) . The program that generated the pdf files is x= 1:10; y1= x; y2= y1/2; plot.one = function( x, y ) { lines( x, y, col="blue"); points( x, y, col="blue", pch=21, cex=1); } pdf(file = "try.PDF") plot(0, type="n", xlim=c(1,10), ylim=c(1,10)) plot.one( x, y1 ) plot.one( x, y2) dev.off() system("ps2pdf14 try.PDF try.pdf") # distillation. ----------------------------- Obviously, the error can be in ghostscript, not in R. Or it can be that R produces a pdf file that has some slight problems that do not usually show up, except when distilled. Before I get too badly flamed, feel free to ignore this. I am just trying to help. It took me some time to whittle down the program to isolate the problem. R was invoked under OSX via "R --vanilla" and is version 2.8.1. ghostscript is 8.62 (2008-02-29) under OSX. (It should be easy to check whether this also occurs under linux.) /iaw
R bug or ghostscript bug or my bug?
2 messages · ivo welch, Brian Ripley
I think you are misusing 'distill' here. The canonical distiller is Adobe Acrobat's. and that converts ps to pdf. I've tried your example, and Acrobat can optimize it (probably what you wanted) and if I convert it to .eps in Acrobat, Distiller can distill it. So, nothing wrong with R's pdf files (yet again). (For completeness, I used Acrobat 9 Pro.)
On Mon, 19 Jan 2009, ivo welch wrote:
Dear R developers: The following R program produces a pdf file that does not survive ghostscript distillation correctly. The undistilled version is at http://welch.econ.brown.edu/temp/try.PDF while the distilled version is at http://welch.econ.brown.edu/temp/try.pdf . When previewed, the points are wrong in the distilled .pdf version, but only in one of the two points invokations (huh?) . The program that generated the pdf files is x= 1:10; y1= x; y2= y1/2; plot.one = function( x, y ) { lines( x, y, col="blue"); points( x, y, col="blue", pch=21, cex=1); } pdf(file = "try.PDF") plot(0, type="n", xlim=c(1,10), ylim=c(1,10)) plot.one( x, y1 ) plot.one( x, y2) dev.off() system("ps2pdf14 try.PDF try.pdf") # distillation. ----------------------------- Obviously, the error can be in ghostscript, not in R. Or it can be that R produces a pdf file that has some slight problems that do not usually show up, except when distilled. Before I get too badly flamed, feel free to ignore this. I am just trying to help. It took me some time to whittle down the program to isolate the problem. R was invoked under OSX via "R --vanilla" and is version 2.8.1. ghostscript is 8.62 (2008-02-29) under OSX. (It should be easy to check whether this also occurs under linux.) /iaw
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Brian D. Ripley, ripley at stats.ox.ac.uk 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