title: Can’t display PyPlot in Juno
body: <p>I have a problem about the plot data on juno using pyplot.</p>
  
  <pre><code>using PyCall
  using PyPlot
  x = linspace(0,2*pi,1000); y = sin(3*x + 4*cos(2*x))
  plot(x, y, color="red", linewidth=2.0, linestyle="--")
  </code></pre>
  
  <p>After I did "eval all" in Juno, nothing happened.</p>
  
  <p>Is there a solution in solving this problem? 
  thanks</p>