title: Limiting the range of y-axis
body: <p>I have values on my y-axis from 0.0 to 1.0, but I'm only interested in 0.0 - 0.4. Is there a way I could only show points in range 0.0-0.4? I know dygraphs has also horizontal zoom. It would be great to have this when I load the graph.</p>
  
  <p>Thanks</p>