[R] color of error bars in Dotplot (Hmisc)
dieter.menne at menne-biomed.de
Wed Jul 27 14:35:04 CEST 2011
Irene Prix wrote:
> In a grouped Dotplot, is there any way to set the color of error bars to
> be the same as the corresponding symbols?
> Dotplot(variety~Cbind(yield, yield+2, yield-2)|year, groups=site,
Customizations of this type can require tricky-digging into the code.
Dotplot calls panel.dotplot, where you find a line
plot.line <- trellis.par.get(if (gp) "superpose.line" else "plot.line")
gp=TRUE when there are groups. So let's give it a try (thanks for the
self-contained example code)
# using global assignment here, better use local
superpose.line = trellis.par.get("superpose.line")
Dotplot(variety~Cbind(yield, yield+2, yield-2)|year, groups=site,
The good news: the lines are black. The bad news: they are all black, which
is the first term. So it looks like these lines are not vectorized (Frank,
You might be able to get customized results with panel.arrow.
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