David Scott <d.scott <at> auckland.ac.nz> writes:
>
>
> I would like to add some vertical lines to a lattice plot of histograms.
> What I am after is a lattice version of abline(v = 1234). The lattice
> histogram plot is just:
>
> histogram( ~ LTSE | approach, data = arrivals)
>
As a little variation on the histogram docs example:
histogram( ~ height | voice.part, data = singer,
xlab = "Height (inches)", type = "density",
panel = function(x, ...) {
panel.histogram(x, ...)
panel.abline(v= 70)
panel.mathdensity(dmath = dnorm, col = "black",
args = list(mean=mean(x),sd=sd(x)))
} )
Dieter
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