R: Changing the size of a heatmap.2 rowname column

r heatmap gplots
Nick picture Nick · Feb 16, 2015 · Viewed 9k times · Source

I used the following code:

library("gplots")
heatmap.2(assay(vsd)[ens_union,], trace = "none", density.info = "none")

To produce the following heatmap:

heatmap.2: row labels cut-off

As you can see, the row labels have been cut-off (the first one should, for instance, be ENSMUSG00000000088, but only ENSMUSG0 is displayed). How can I re-size the plot to include the whole labels?

Answer

Mehdi Nellen picture Mehdi Nellen · Feb 16, 2015

Just add the margins argument

library("gplots")

# generate some example data
data <- as.matrix(mtcars)

# make ridiculously long names
long.names     <- paste("ENSMUSG000000000", rownames(mtcars))
rownames(data) <- long.names

# GO!
heatmap.2(data, trace = "none", density.info = "none", 
          margins = c(8, 16))

Don't forget you can also change the font size if you like with cexRow

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