[BioC] heatmap.2 coloring question

[James W. MacDonald]

 From ?colorpanel in gplots:

showpanel <- function(col)
      {
        image(z=matrix(1:100, ncol=1), col=col, xaxt="n", yaxt="n" )
      }
showpanel(colorpanel(40, "blue","white","yellow"))

Best,

Jim



Srinivas Iyyer wrote:
> Dear group, 
> I am using heatmap.2 for heatmaps. 
> 
> heatmap.2(res1,cexRow = 0.28,cexCol=0.28
> ,col=rev(heat.colors(16)),keysize=1,na.color=par("bg"),densadj
> = 0.25,Colv=FALSE)
> 
> 
> 
> I want to have a color key starting from blue to
> yellow through white.
> 
> Say -7 is my min value and +4 is my max value. 
> 
> Values around 0 should be totally white. 
> 
> what kind of trick can do that for me. I will be very
> happy if I can do that. 
> 
> Any suggestions, please. 
> thank you. 
> srini
> 
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-- 
James W. MacDonald, M.S.
Biostatistician
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109
734-647-5623