title: Edit the innerRadius of D3 Sunburst visualization
body: <p>How can I change the radius of the innermost circle of the Sunburst visualization? See following example: (<a href="http://bl.ocks.org/d/910126/" rel="nofollow noreferrer">http://bl.ocks.org/d/910126/</a> - notice how large is central area; can it be smaller?)</p>
  
  <p><img src="https://i.stack.imgur.com/nzIf5.png" alt="enter image description here"></p>
  
  <p>Also, is it possible to define different heights for all the layers in the Sunburst?</p>