Correction to: Genome Biol (2019) 20:134

https://doi.org/10.1186/s13059-019-1732-1

Following publication of the original paper [1], the authors identified an error in the paper.

In the Additional file 1, Figure S4b, both Figure S4a and S4b show the same histogram. This is incorrect. The corrected Additional file 1 is supplied in this correction article.