search for: grtaphic

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2008 Jan 31
1
png() and pdf() alignment problems
...n=27) r <- sqrt(outer(x^2, y^2, "+")) z <- cos(r^2)*exp(-r/6), col=gray((0:32)/32) # example1 # standard device size pdf("pdf_fit.pdf") image(z) dev.off() png("png_fit.png", res = 96) image(z) dev.off() # both files overlay with high precision # as known from R grtaphics output # see attached example example1.pdf # example2 # custom device size pdf("pdf.pdf", width = 8, height = 4) image(z) dev.off() png("png.png", width = 8, height = 4, units = "in", res = 96) image(z) dev.off() # png output is somewhat larger # and aligning them i...