[R] make an own (different) color legend with spplot()

[Marcel J.]

Hi!

Is there a way to manually costumize the color legend in an spplot() - 
especially where to draw ticks and labels for the ticks?

The reason I'm asking: Usually spplot() automatically divides the data 
into fitting slices and makes a color legend (also automatically).

I want to assign the slices myself and have a fixed scale instead of an 
automatic/dynamic scale.

I think what I want gets clear in this example:

library(sp)

data(meuse.grid)
gridded(meuse.grid) = ~x+y

## DATA GENERATION
meuse.grid$random <- rnorm(nrow(meuse.grid), 7, 2) # generate random data
meuse.grid$random[meuse.grid$random < 0] <- 0 # make sure there is no 
value is smaller than zero ...
meuse.grid$random[meuse.grid$random > 10] <- 10 # and bigger than ten
## DATA GENERATION FINISHED

## making a factor out of meuse.grid$ random to have absolute values 
plotted
meuse.grid$random <- cut(meuse.grid$random, seq(0, 10, 0.1)) # here I 
assign the levels I want to use in my plot!!!

spplot(meuse.grid, c("random"), col.regions = rainbow(100, start = 4/6, 
end = 1)) # look at the color-legend - not so good.

The graphic itself is like I want it, but the legend doesn't look too 
good. Although I assign 100 factors, I want just a few ticks in the 
legend (and also just a few labels).

How can this be achieved?

Thank you!

Marcel