Dear All,

I have a data matrix that has 17 samples and over 800 genes that belong to ten different gene families.  I want to show these gene families in heatmap by marking them. 

I performed heatmap but I do not know how to show gene families in the heatmap graph.

Anyone knows how to that?
Yes, as per Sean, in *ComplexHeatmap*, you can segregate your heatmap into 'blocks' of different genes using the 'split' parameter. You can end up with nice heatmaps like this: https://www.biostars.org/p/273155/#273172

**Edit April 16, 2019:  skip to the working example, here: https://www.biostars.org/p/286187/#286507**