[R] ggplot2 legend problem - SOLVED

[Chris Friedl]

Trawling the online and pdf manuals for density plots further I found a
reference to position and tried it with histograms. It worked!

So here is an example that gives me overlapping histograms, alpha
transparency so they can both be seen in the area of overlap, and with
properly labelled and colored legend.

require(ggplot2)
x <- data.frame(value=rnorm(5000, mean=0), case="A")
y <- data.frame(value=rnorm(5000, mean=3), case="B")
xy <- rbind(x, y)
ggplot(xy, aes(x=value, fill=case, group=case)) + geom_histogram(alpha=0.5,
binwidth=0.1, position="identity")

hth
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