https://www.data-imaginist.com/posts/2017-02-06-ggraph-introduction-layouts/
In the first post in a series of ggraph introductions I will talk about how ggraph specifies and uses layouts
data imaginistintroductionggraphlayouts
https://www.data-imaginist.com/posts/2017-02-23-announcing-ggraph/
ggraph, a package for creating network and tree visualizations using the ggplot2 API has just been released on CRAN
announcingggraphgrammargraphicsrelational