[R] Heatmap: draw horizontal line

[Matthias Kohl]

Is

heatmap.2(mat,Rowv=NA,trace = 'none',key=F, add.expr = abline(h = 
c(3.5,5.5), lwd = 3))

what your are looking for?

hth,
Matthias

Paul Evans schrieb:
> Hi,
>
> I wanted to draw a heatmap with some horizontal lines. For example:
>
> #------ code ------
> mat <- matrix(-1:1,7,9)
> heatmap.2(mat,Rowv=NA,trace = 'none',key=F)
>
> #----end code -----
>
> In this heatmap, I want to subgroup the rows. For instance, I would like to group rows 5,6 & 7 together, and would draw a black line between rows 4 & 5 to demarcate the group. Similarly, I want to group rows 3 & 4 in one group, and would like to put a black line between rows 2 & 3.
>
> I guess I'm looking for the 'hline' parameter or something, but couldn't find it in the documentation.
>
> Any help would be appreciated!
>
>
>
>       
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>
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-- 
Dr. Matthias Kohl
www.stamats.de