[R] break error bars in ggplot2
bbolker at gmail.com
Tue Nov 15 14:44:44 CET 2011
Fischer, Felix <Felix.Fischer <at> charite.de> writes:
> i use ggplot to plot some measures including CIs as horizontal
> errorbars. I get an error when the scale
> limits are narrower than the boundaries of the error bar and
> hence the CIs are not plotted.
> df <- data.frame(resp=c(1,2), k=c(1,2), se=c(1,2))
> ggplot(df, aes(resp,y=k)) + geom_point() +
> geom_errorbarh(aes(xmax = resp + se, xmin = resp - se)) +
> Is there a way to plot the errorbars anyway? Setting
> xmax to the scale limit is not so good, I guess, because
> you couldn't determine whether the CI is wider than the scale limits or not.
I'm not sure I completely understand your last paragraph, but
I think you want to substitute
for your scale_x_continuous() component; as discussed in the ggplot2
book, limits set on scales act differently than limits set on
coordinate systems. (I'm a little surprised you get an error, though.)
There's a very active ggplot2 google group that might be best
for ggplot(2)-specific questions ...
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