How to create a chord diagram and add legends in R

First thing first, I’ve included the packages for plotting the diagram. In order to install ComplexHeatmap, you would have to install BioManager first, and use install functions in BioManager to install ComplexHeatmap (might have been updated now). I commented the installation codes just in case you need it. I believe the other packages can either be installed through CRAN or github. The last package chorddiag is irrelevant to this tutorial, but it’s another neat package for chorm diagram. I believe it’s a wrapper for D3, which is more interactive than circlize.

Let’s go ahead and create some dataset!

This is what the sample data looks similar to this:

Now that we have the chord diagram, let’s get the legend on the side.

Viola! Now we have a chord diagram with legends on the sides, and you can adjust the positions of different legends based on your screen size. It’s a bit of manual work, but the results are satisfying.

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