[BioC] heatmap colours

[Jean Yee Hwa Yang]

Hi Stephen,

Try the maPalette function in marrayPlots.  You can create many different
color palettes by specifying the low, and high end of the color. 

See help(maPalette) for more details

## Red -- Black -- Green
rbg <- maPalette(low="green", high="red", mid="black")
heatmap(data, col=rbg)

## Red -- white -- Green
rwg <- maPalette(low="green", high="red", mid="white")
heatmap(data, col=rwg)

## blue--yellow
by <- maPalette(low="blue", high="yellow")
heatmap(data, col=by)

Cheers

Jean


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Jean Yee Hwa Yang			 jean at biostat.ucsf.edu
 Division of Biostatistics,		   Tel: (415) 476-3368
 University of California,		   Fax: (415) 476-6014
 500 Parnassus Avenue, MU 420-W,  San Francisco, CA 94143-0560
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

On Mon, 12 May 2003, Stephen Henderson wrote:

> I have been using the new heatmap() function of the mva library to look at
> gene expression data (thanks to D. Murdoch). I can't find a suitable color
> palette with R or RColorBrewer. So has anyone created a Red-Black-Green, or
> Red-Black-Blue palette they might like to share?
> 
> Yours Hopefully
> Stephen 
> 
> 
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