title: How to use an R script from GitHub?
body: <p>I am trying to use an R script hosted on GitHub <a href="https://github.com/byzheng/leaflet/blob/5c207af4764dc83e1736e1e4dd8e88e9fca84856/R/plugin-draw.R" rel="nofollow noreferrer">plugin-draw.R</a>. How should I use this plugin?</p>