How to set cairo as default backend for x11() in R?

cairo, ggplot2, r

Solution

Define another function 'x11' which sets the proper type:

x11 = function (...) grDevices::x11(...,type='cairo')

Problem

I am using ggplot2 on ubuntu 12.04. By default my x11 type is set to Xlib. So when I use a smoother in qplot, I get an error like: "semi-transparency is not supported on this device: reported only once per page". However, if I call x11(type="cairo"), everything works fine. How do I get cairo as the default backend for x11?

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