title: Venn diagram layout with d3.js
body: <p>Is there a sample on how to do Venn diagram using d3.js? I know about the <a href="http://bl.ocks.org/1067636" rel="noreferrer">two</a> <a href="http://bl.ocks.org/1067616" rel="noreferrer">samples</a>:</p>
  
  <p><img src="https://i.stack.imgur.com/LPhoK.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/RHbiB.png" alt="enter image description here"></p>
  
  <p>that are provided on D3 website. However they force me to calculate by myself the x.y position of the circles. I am hoping to feed just the data (circle sizes and overlap size) to a function/chart and it should do the layout for me.</p>