How to put black borders in heatmap in R

Question

Hi I created a heatmap in R using \"heatmap.plus\" which is shown in the link

http://i.stack.imgur.com/hizBf.jpg

but I need the heat map to look like the heatma

Answer 1

Have you tried using heatmap.2? It has paramaters to do just that.

require("gplots")

data <- # matrix or data frame for your data.

heatmap.2(data, 
          sepwidth=c(0.05, 0.05),  # width of the borders
          sepcolor='black',        # color of the separation lines
          )

You may need more in the parameters depending on what you want in your graphs. R's help on the heatmap.2 function covers pretty much everything you need: ?heatmap.2