title: Solid and dashed line on the same series with nvd3
body: <p>I'm trying to generate a multi-chart in NVD3 with a line which is solid and dashed after a specific value. The x-axis depends on time. I need have a dashed line (blue) for values in the future.</p>
  
  <p>Now, I have this graph:</p>
  
  <p><a href="https://i.stack.imgur.com/8uTet.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8uTet.png" alt="enter image description here"></a></p>
  
  <p>I need have something like this: </p>
  
  <p><a href="https://i.stack.imgur.com/DaAo6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DaAo6.png" alt="enter image description here"></a></p>
  
  <p>Is this possible? Thanks</p>