Question

By using the command:

heatmap.2(exp, col = greenred(100), scale="none", ColSideColors = Carcolors, 
    # dendrogram = "row",
    key=T, symkey=FALSE, density.info="none", trace="none", cexRow=1, cexCol=0.9)

The heatmap2 plots “samples” as columns and variables as rows. How can I rotate the heatmap counterclock wise 90 degree so the sample names are listed on the right and variables are listed on the top (with RowSideColors on the right also)? Thanks!

Answer 1

I am not sure if I understand you right, but does a tranpose of your matrix do the job?

Here is an example:

 require(gplots)
data(mtcars)
x  <- as.matrix(mtcars)
heatmap.2(x)

# transpose the matrix
heatmap.2(t(x))