Hi Scott,
You can put the vline data in a separate data.frame:
dat - data.frame(x=rnorm(20), y=rnorm(20), z=rep(c(a, b), each=10))
vline.dat - data.frame(z=levels(dat$z), vl=c(0,1))
library(ggplot2)
ggplot(dat, aes(x=x, y=y)) +
geom_point() +
geom_vline(aes(xintercept=vl), data=vline.dat) +
facet_grid(.~z)
Best,
Ista
On Tue, Nov 9, 2010 at 4:41 PM, Scott Chamberlain scham...@rice.edu wrote:
Hello,
I am plotting many histograms together using facet_grid in ggplot2. However,
I want to then add a vertical line to each histogram, or facet, each of
which vertical lines are at different x-values.
The following example adds all vertical lines to each facet:
ggplot(data,aes(values)) + geom_histogram() + facet_grid(.~variable) +
geom_vline(xintercept=c(5,10,15))
How can I add a vertical line at different x positions on each facet?
Thanks very much,
Scott Chamberlain
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
