On Mon, 6 Sep 2004, Arne Henningsen wrote: > On Monday 06 September 2004 12:05, Laura Quinn wrote: > > On Mon, 6 Sep 2004, Barry Rowlingson wrote: > > > Laura Quinn wrote: > > > > I am trying to save a series of plots as .png files by using > > > > > > > > png(file="myfile.png",bg="transparent") > > > > dev.off() > > > > > > > > for each image plot I produce. Unfortunately when I have tried this I > > > > am unable to open the files, and am told they are corrupted. > > > > > > > > I have tried to use the jpeg() function but have the same problem. The > > > > only way I have managed to export a graphic successfully is as > > > > dev.copy2eps. Aside from producing unwieldy files, this is also > > > > unhelpful as [EMAIL PROTECTED] hoping to create a movie of the images via > > > > ImageMagick. > > > > > > This sounds a bit obvious, but are you doing your plot commands > > > _between_ the png() call and the dev.off() call? > > > > > > Try: > > > > > > png(file="foo.png") > > > plot(1:10) > > > dev.off() > > > > > > What version/platform are you using? > > > > Yes, I have been using the above call to no avail. I'd be suprised if my > > libpng wasn't up-to-date on SuSe 9.0, but I'm not sure how to check which > > version I have? > > I have also SuSE 9.0 and R-1.9.1, but I have no problems with png(). Did you > compile R from source or did you install it from a rpm file? > > To figure out your version of libpng type on a console: > rpm -qa libpng* > > I get: > libpng-devel-1.2.5-194 > libpng-1.2.5-194
There is a security advisory on that version: you should upgrade to 1.2.6. (It does not affect R, which only write png files.) -- 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 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html