On Tue, 2 Oct 2007, Marcin Kozak wrote: > This may be an easy question, but let me ask it. When writing a plot > to a jpeg file:
You do realize that is not what this does: it copies a plot from a screen device to a jpeg device? >> plot(runif(30)) >> dev.print(file="test.jpeg", device=jpeg, width=600) > > the plot I receive has gray background, the result on no account I > want to receive. The same situation occurs when printing to a bmp > file. But when printing a pdf file, the background is white as it > should be. Why 'should' it be? You haven't specified a white background anywhere, and on-screen the background is transparent not white on many devices including windows(). > What should I do to have a plot in a jpeg file with white > background? Specify a white background (bg="white") for the device you copy *from* or for the plot. (The background is part of the plot.) I presume you are on Windows, since you mention bmp, but please do tell us such things. If so, you are copying a plot with a transparent background, and that is why the jpeg is showing as grey (the canvas used). If you copy to png you get a transparent background and see whatever canvas your viewer uses. Alternatively, plot on the jpeg() device directly rather than copying to it, for that device defaults to a white background. -- 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@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.
