Straightforward way to add axis labels to pheatmap?

General
1 
library(pheatmap)
mymat <- matrix(rexp(100, rate=1), ncol=10)

pheatmap(mymat)

image
image952×761 12.4 KB

The plotted heatmap looks how I want it, but I cannot figure out a straightforward way to add labels to the x-axis and left y-axis. I can modify the title using main, but no such option for the axes.

Additionally, some threads suggest trying to use the grid package, and modify grid.text - but this seems a bit convoluted and consistently messes with my plot's aspect ratio.

Is there a better way?

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