title: Change range for one y axis nvd3/d3
body: <p>I am currently using the multiChart model and I have two different y Axes.  I would like to like to change both of the axes so that they start at 0 because currently they start at the smallest y data point.</p>
  
  <p>I have tried doing the following</p>
  
  <pre><code>chart.yAxis1
  tickFormat(d3.format(',.f'))
  .domain([0,max_y]);
  </code></pre>
  
  <p>but that doesnt seem to work</p>
  
  <p>and </p>
  
  <pre><code>.forceY ([0, max_y])
  </code></pre>
  
  <p>it tells me that there is no forceY function</p>
  
  <p>Any ideas?</p>