[R] Coloring spaces between lines in xyplot

[hadley wickham]

On Thu, Sep 18, 2008 at 5:14 PM, Seth W Bigelow <sbigelow at fs.fed.us> wrote:
>
> Greetings:
>  I wish to create a stacked line graph in xyplot, adding color to the
> spaces between the lines. For example, the code below creates a plot with
> two lines extending across it, and I want to color the rhomboid that is
> between the upper and lower line, and between the lower line and the bottom
> of the frame.
> Suggestions appreciated

Well, if you relax the condition to use lattice, try

install.packages("ggplot2")
library(ggplot2)

x <- rep(seq(1,10), 2)
y <- c(1+1.5*(1:10), 0.2 + 1.3*(1:10) )
trt <- rep(c("low", "high"), each = 10)

qplot(x, y, fill=trt, geom="area")

Hadley

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