Font sizes in geom_text and theme_text

[Winston Chang]

Font sizes in geom_text/annotate seem to be very different from those in theme_text. In this example, both sizes are set to 12, but the result is very different:

ggplot(data.frame(x=1:3), aes(x=x, y=x)) + geom_point() +

    annotate(geom="text", x=2, y=2, label="Annotation text", size=12) +

    opts(title="This is a Title") +

    opts(plot.title=theme_text(family="Times", face="bold", size=12))

In the code for geom_text, the textGrob gets this, with units="native":

  fontsize = size * .pt,

In theme_text, the textGrob gets this, with units="npc":

 fontsize = size

.pt is defined in aaa-constants.r to be:
.pt <- 1 / 0.352777778

Anyone know why it's like this?

-Winston

[Hadley Wickham]

geoms uses mm for all sizes.

themes are not so consistent :/

Hadley

--
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/