Re: [R] image() with color key?

[Sean Davis]

Have you looked at the code for the heatmap and heatmap.2 (gregmisc 
package)?  Also, it seems you might be able to do it with grid 
graphics?  Finally, I think there is a colorbar command in the marray 
package available at http://www.bioconductor.org that generated color 
bars for image plots.  A combo of image and colorbar (?maColorBar) in 
grid or something like that may work.

Perhaps the simplest solution would be to use heatmap or heatmap.2 
directly with dendrogram='none'.

Hope this helps.
Sean
On Sep 3, 2004, at 4:20 PM, Berton Gunter wrote:
In some applications, e.g., visualizing the values of the wells in a 
96 well
(8 x 12) assay plate, the matrix of results is truly discrete and you 
want
to visualize it that way. image() does this, but not filled.contour() 
AFAIK.
If that's correct, the only way I know how to do it is to overlay two 
plots
(par(new=FALSE)),one for the data and the other for the legend. This is
certainly not trivial, but it's not impossibly hard, either.

I hope I'm wrong on this, though, as I'd welcome an easier way, too.
-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
"The business of the statistician is to catalyze the scientific 
learning
process."  - George E. P. Box

Does filled.contour() give you what you want?
Deepayan
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