hadley/ggplot2 — pull request #603 by wch (2012-06-28 06:51:14+00:00)
Title: Axis line above panel

This fixes #585.

Regular and `facet_wrap` work:

```R
qplot(wt,mpg,colour=hp, data=mtcars) +
theme(axis.line = element_line(colour='black', lineend='square', size=4))

qplot(wt,mpg,colour=hp, data=mtcars) +
theme(axis.line = element_line(colour='black', lineend='square', size=4)) +
facet_wrap(~cyl)
```

However, `facet_grid` still doesn't work properly. I think there needs to be a good way to edit the z values (in `facet_render.grid`) after the gtable has been created.

```R
qplot(wt,mpg,colour=hp, data=mtcars) +
theme(axis.line = element_line(colour='black', lineend='square', size=4)) +
facet_grid(am~cyl)
```