Prof Brian Ripley wrote: > On Mon, 20 Feb 2006, Prof Brian Ripley wrote: > >>On Mon, 20 Feb 2006, Paul Murrell wrote: <snipped> >>>> >> x11() >>>> >> plot(rnorm(10)) >>>> >> dev.print(png) <snipped> >>I don't think there is a way to do that unambiguously (there is no >>standard way to do the conversion), and in any case dev.print() was passed >>a function, not the name of a function, and so does not in general know >>how it behaves (and your 'png' need not be R's png()).
There is a "standard" way of querying the X display directly about the size each pixel supposedly represents - well, an X display can be configured wrongly, etc, but you get what you ask for... $ xdpyinfo |grep 'resolution' resolution: 75x75 dots per inch (this 75x75 seems to be a default value as I did not set it anywhere, but I believe it is configurable) I am not sure about png files, but tiff files also have internal data claiming x pixels corresponds to y inches. (and I am fairly sure jpeg does *not* have this feature). HTL ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
