r - Modifying fonts in ggplot2

Question

I am looking for a way to modify font types in ggplot. At the moment I would be happy enough to simply change fonts to the 'courier' font family, but ultimately my goal is to call a custom font template--any input on this latter point would be very much appreciated.

I've done a bit of homework, looking at the following posts and articles:

• ggplot2: How to change font of labels in geom_text
• R News Volume 6/2, Non-Standard Fonts in PostScript and PDF Graphic, Murrell and Ripley.
• ComputerModern font in ggplot2 graphics?

It may be because I am still a hopeless amateur with ggplot2, but I haven't even been able to switch chart fonts to courier. Any help? I've included the data for the chart in question, below, along with the code, so hopefully this is all easy enough to follow.

Answer 1

I think your answer is fine but you can do it more simply:

install.packages("extrafont");library(extrafont)
font_import("Trebuchet MS")
library(ggplot2)
qplot(1:10)+theme(text=element_text(family="Trebuchet MS"))