multi-line xvalues when making a heatmap with a matrix

I create a heatmap using a matrix. I would like for the xvalues labels to each be on two lines, not one long one that stretches out diagonally. Is this possible?

I am using the heatmap function in R2017a.

[jonas]

have a look at this FileExchange function ( link )

Answer 1

[Benjamin Kraus]

The heatmap function currently doesn't allow multi-line x-value labels.