R help - Nov 2003 - Levelplot and NAs

Dear all

How does one get a levelplot (lattice library) to plot NAs in a
different colour to that specified in the default colorkey? 

Thanks in advance,
Albertus

-- 
Dr. Albertus J. Smit
Department of Botany
University of Cape Town
PO Box Rondebosch
7700
SOUTH AFRICA

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On Thursday 06 November 2003 05:33, AJ Smit wrote:
> Dear all
>
> How does one get a levelplot (lattice library) to plot NAs in a
> different colour to that specified in the default colorkey?
You can't do it. If you don't need to distinguish NA's and missing
points
(that is (x,y) pairs that are completely absent from the data, as opposed to 
being present with a z-value of NA), you can use panel.fill() to fill the 
background with your 'NA' color. Something like

levelplot(...

          panel = function(...) {
              panel.fill(col = "red")
              panel.levelplot(...)
          })

Otherwise, change NA's to some suitable number before plotting.

Deepayan