Question

I have a data.matrix that is approximately 4000 rows and 100 columns. I am doing a heatmap of the data like:

data<-heatmap(data_matrix,Rowv=NA,Colv=NA,col=cm.colors(256),scale="column",margins=c(5,10))

But the problem that I got is that the labels that appear in the column are too grouped, so it is impossible to visualize them correctly. How I can resize the heatmap so I can see the values of the labels of the column? I tried to print it in pdf, but it only appears a black stripe.
Thanks

I am including a figure of the heatmap, the portion that I want to see are the labels that are in the right part, but they are too close together.

Answer 1

In Rstudio you can easily resize the graphic window, same holds for Rgui. Alternatively, if you save the plot to file you can use a bigger size for your graphics, e.g. bigger width and height when calling pdf or png.