This guest post is by Stephen Turner on his preprint qqman: an R package for visualizing GWAS results using Q-Q and manhattan plots, available on bioRxiv here. This is a modified version of a post from his blog. Three years ago I wrote a blog post on how to create manhattan plots in R. After hundreds of comments pointing out bugs and other issues, I've finally cleaned up this code and turned it in
![Author post: qqman: an R package for visualizing GWAS results using Q-Q and manhattan plots](https://cdn-ak-scissors.b.st-hatena.com/image/square/3a3976eab44b983f29053aa508c31885983007f1/height=288;version=1;width=512/https%3A%2F%2Fhaldanessieve.org%2Fwp-content%2Fuploads%2F2014%2F05%2Fmanhattan_01_basic.png)