color key with xyplot

Do you mean a colorkey as is usually drawn in levelplot (and not key) ? 
xyplot is not designed to draw color keys directly. You could use the key
argument to xyplot to emulate it somewhat 
(something like key = list(rect = list(col = 1:7), space = "right"))

Alternately, you could modify the object produced by xyplot to add a colorkey
component, which would be enough to fool print.trellis:

foo <- xyplot(<whatever>)
foo$colorkey <- list(col = 1:7,  at = 1:8, tick.number = 10)
print(foo)

Dear all,

I'd like to draw a color key beside a graph drawn with xyplot (lattice
library). I am aware of the draw.colorkey function (grid library) but
don't know how to handle it. Any hint would be appreciated.

Renaud

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