source_url("https://raw.github.com/gist/1654919/8161f74fb0ec26d1ba9fd54473a96f768ed76f56/test2.r")
# With a hash, to make sure the remote file hasn't changed
source_url("https://raw.github.com/gist/1654919/8161f74fb0ec26d1ba9fd54473a96f768ed76f56/test2.r",
sha1 = "fc6551f13ceddcbe0730ff74c4300f2682c74028")
Run the code above in your browser using DataLab