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!
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