On Tue, 17 Jan 2006, Hilmar Berger wrote: > In R, it is not possible to set the font size of axis labels directly > (AFAIK).
Nor of anything else, since you are limited to the fonts available on the output device. > Instead, scaling factors for the font chosen by the graphics > device can be supplied. It appears that there is no constant font size > for axis labels. My impression is that the axis label font size is > scaled internally by R depending on the number of labels given for an axis. Please can we have a demonstration of this: I have never seen it. > In addition to the R-internal scaling I need to adjust the axis label > font size for label length and the size of other elements in the same > layout. > > In order to use sensitive values for those externally supplied scaling > factors (cex) I would like to know how R scales axis font sizes internally. > Could someone point me to the method/file in the R-source code (R 2.1.1) > where this scaling is done ? I don't believe there is any scaling. And 2.1.1 is not current. The code used is in do_axis in src/main/plot.c. The font size is selected at Rf_gpptr(dd)->cex = Rf_gpptr(dd)->cexbase * Rf_gpptr(dd)->cexaxis; that is, just the base 'cex' multiplied by 'cex.axis' (as documented in ?axis in current R). So the target font size is 'pointsize' * 'cex' * 'cex.axis' where the first term is set by the specific device, the second by par("cex") and the third either via par("cex.axis") or inline from the axis() call. Devices will produce a nearby font size in a device-dependent fashion (both the postscript/PDF and windows families of devices round to the nearest big point: the story for X11 is much more complicated). -- 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@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html