not sure about gplots, but the one in base R should work well if you
specify the scaling method to be 'none':
heatmap(a4[1:40, ], Rowv=NA, Colv=NA, col=c("grey", "blue",
"purple",
"red"), scale='none')
Regards,
Yihui
--
Yihui Xie <xieyihui at gmail.com>
Phone: 515-294-2465 Web: http://yihui.name
Department of Statistics, Iowa State University
2215 Snedecor Hall, Ames, IA
On Mon, Oct 24, 2011 at 6:07 PM, Weiwei Shi <helprhelp at gmail.com>
wrote:> Hi there,
>
> I have a matrix like this:
>
>> a4[1:20, 1:5]
> ? ? ? ? ? 194 211 294 314 315
> GO:0000003 ? 1 ? 1 ? 1 ? 1 ? 1
> GO:0000072 ? 0 ? 0 ? 0 ? 0 ? 0
> GO:0000076 ? 1 ? 0 ? 0 ? 0 ? 0
> GO:0000082 ? 1 ? 3 ? 1 ? 1 ? 1
> GO:0000083 ? 1 ? 0 ? 0 ? 0 ? 1
> GO:0000086 ? 0 ? 1 ? 0 ? 1 ? 1
> GO:0000114 ? 0 ? 0 ? 0 ? 0 ? 0
> GO:0000115 ? 0 ? 0 ? 0 ? 0 ? 0
> GO:0000117 ? 0 ? 0 ? 0 ? 0 ? 0
> GO:0000160 ? 0 ? 0 ? 1 ? 0 ? 0
> GO:0000212 ? 0 ? 0 ? 0 ? 0 ? 0
> GO:0000216 ? 1 ? 0 ? 0 ? 1 ? 0
> GO:0000226 ? 1 ? 0 ? 1 ? 0 ? 0
> GO:0000278 ? 1 ? 1 ? 1 ? 2 ? 1
> GO:0000320 ? 0 ? 0 ? 0 ? 0 ? 0
> GO:0000710 ? 0 ? 0 ? 0 ? 0 ? 0
> GO:0000768 ? 0 ? 0 ? 0 ? 0 ? 0
> GO:0000819 ? 1 ? 0 ? 0 ? 1 ? 1
> GO:0000910 ? 1 ? 0 ? 0 ? 3 ? 0
> GO:0000917 ? 0 ? 0 ? 0 ? 0 ? 0
>
> I wanted to plot a heatmap to assign "grey" to 0,
"blue" to 1, "purple" to
> 2, and "red" to 3. I did not some trials and found some problems
like this:
>
> When the row is all zero, there could be a white bar in the middle of the
> heatmap though I did not assign "white" to any value.
>
> Or some row believes "grey" as 0 while some rows believes
"blue" as "0".
>
> Did I make some mistake here?
>
> library(gplots)
>
> heatmap.2(a4[1:40,], ?Rowv=NA, Colv=NA, col=c("grey",
"blue", "purple",
> "red"), trace="none")
>
>
> Thanks,
>
> Weiwei
> --
> Weiwei Shi, Ph.D
> Research Scientist
>
>
> "Did you always know?"
> "No, I did not. But I believed..."
> ---Matrix III
>
> ? ? ? ?[[alternative HTML version deleted]]
>
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