Thanks David,

Instead of using terrain.colors or heat.colors, I went with:

library(colorRamps)
cv <- matrix(as.integer(cut(vals2, breaks=100)), dim(vals2))
pal <- blue2green2red(100)  #a function from colorRamps

Do you happen to have any clever ideas for a legend?  I could play around
with a series of polygons to the side of the plot (...xpd=TRUE), but don't
have any better ideas.


Eric

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