I have GRanges object with SNP. I would like to mark it on chromosome using circular plot from ggbio by colour scale - so more SNP in particular region deeper color. Is it any simple way to do it?

Thank you very much for any advice.

Marcin

First need to decide how to summarize the SNP density. Perhaps something like a runsum() on the coverage of SNPs? Then it should be relatively straightforward to plot the Rle in a circular area plot, mapping the value to color.

Not an expert, but perhaps you could coerce that RleList to a GRanges and then generate the circle:

gr <- as(runsum, "GRanges")
ggplot() + layout_circle(gr, geom = "bar", aes(fill = score))