Simon Urbanek wrote:
On Feb 13, 2004, at 11:46 AM, Peter Dalgaard wrote:
Duncan Murdoch <[EMAIL PROTECTED]> writes:
On Thu, 12 Feb 2004 20:50:38 -0500, you wrote:
Is there any way to get a fixed width plot in graphs? I want to put a text
matrix into a plot and this would make it easy.
In the Windows device, fonts 10 and 11 are fixed width "Courier New". In general graphics devices don't have to supply such a font.
In particular, I don't think it is possible in the postscript and x11 devices (unless you switch the basic fonts in postscript). It shouldn't be hard to add, though -- basically just add a Courier font at font positions 6, and maybe continue with bold and oblique variants. However, I wouldn't know whether any of what Paul has been up to involves a more radical solution to font handling in general.
The current R-devel graphics device API supports font family name - I just didn't check yet which parameter is used to set it (fontfamily?).
I have added fontfamily to the "graphics context" information that can be passed from the graphics engine to graphics devices. Two rather important things remain to be done:
(i) the devices need to do something with this information. As Duncan Murdoch pointed out, Windows already allows something similar via a device-specific approach to the existing font parameter. I have suggested (but not yet tried to implement) a more device-independent approach in http://www.stat.auckland.ac.nz/~paul/R/gpars.html (linked off the "R Developer" web page). I haven't really had feedback on this suggestion yet and I intended to elicit more before hacking any code.
(ii) the graphics systems (base and grid) need to allow the user to set this information. grid has a fontfamily gpar, but base has nothing yet. Again a suggested implementation is in http://www.stat.auckland.ac.nz/~paul/R/gpars.html and there is a bit more in http://www.stat.auckland.ac.nz/~paul/R/fonts.html
Going back to the original question, for Windows, postscript, and pdf at least, if you have a mono-spaced font on your system you should be able to use it, but the way in which you specify it will differ (see the docs for each device). In future versions this should become as simple as specifying the appropriate font name as a par() for all devices.
Paul -- Dr Paul Murrell Department of Statistics The University of Auckland Private Bag 92019 Auckland New Zealand 64 9 3737599 x85392 [EMAIL PROTECTED] http://www.stat.auckland.ac.nz/~paul/
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