On 9/5/2008 8:06 AM, yk wrote:
I have drawed a picture with persp, it's 3d map with different color,
indicate different altitude. In gnuplot, the corresponding command
'splot' will generate a picture beside to indicate the relationship
between color and altitude. But in R, how to draw it? I have read the
manual of legend, but they are all about how to draw a legend with
colored text, not a continuous varing color with corresponding number.
I don't think there's an automatic way to do this (though probably some
package provides one).
If you want to write your own, take a look at example(filled.contour).
The legend it draws is done by this code:
plot.new()
plot.window(xlim = c(0, 1), ylim = range(levels), xaxs = "i",
yaxs = "i")
rect(0, levels[-length(levels)], 1, levels[-1], col = col)
if (missing(key.axes)) {
if (axes)
axis(4)
}
else key.axes
box()
(but it has done a lot of setup using layout() and par() before this).
Duncan Murdoch
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