title: r shiny decision tree (tree with states and probabilities) functionality
body: <p>Does there exist a functionality to implement a decision-tree like interactive element in <code>R</code> <code>Shiny</code>? (By ' decision-tree' I mean something like <a href="http://people.ischool.berkeley.edu/~hal/Papers/2004/DNC-HTML/graphics/DecisionTree.png" rel="nofollow">this</a> :) ).</p>
  
  <p>I expect a tree to be quite 'branched' in my case and I wish I am able to present only a part of it (e.g. nodes, their parents [with siblings] and their children), allowing user to move it 'up/down' interactively.</p>
  
  <p>Any ideas? Thank you a lot for any hint in advance!</p>