This is a similar example to some of my others, but this is the code I used in class on 27/03/2017 to introduce CMT212 to forces simulations in D3
forked from martinjc's block: D3 - Force simulation, curved weighted links (Data: Welsh Assembly Twitter Connections)
Modified http://d3js.org/d3.v4.min.js to a secure url
https://d3js.org/d3.v4.min.js