I have been trying to plot using spplot().  My variable is a factor, but
some levels are unused.  When I plot the map with a key (using the default
colorkey=T) everything plots fine.  But when I remove the key (colorkey=F)
all of the colors map to the wrong factors (I am assuming this is because
some of the factor levels are unused).

This maps as I would expect it, with the key:
spplot(worldmap, "mu.level", lwd=0.01, col="white", scales = list(draw = F),
colorkey = T,  par.settings=list(fontsize=list(text=10, points=10)),
cuts=24, col.regions=colvec)


Is there any way to hide/get rid of the key without changing the plot (i.e.
without using colorkey=F)?

Thanks!

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