title: polar chart data flipping
body: <p>I am trying to flip the data to 45 degree instead of 135 degree as per below figures.</p>
  <p>my code for ploar plotting is</p>
  <pre><code>R= ( file_array.max(axis=1)/np.amax(file_array.max(axis=1)))
  ax = plt.subplot(111, polar=True)
  ax.plot(radians,abs(R))
  ax.set_xlabel('relative amplitude')
  ax.xaxis.set_label_coords(1, 0.2)
  ax.set_thetamin(0)
  ax.set_thetamax(180)
  ax.set_thetagrids(range(0, 181, 30))
  </code></pre>
  <p>Need Image Like this<br />
  <a href="https://i.stack.imgur.com/nDTPA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nDTPA.png" alt="enter image description here" /></a></p>
  <p>As per my code</p>
  <p><a href="https://i.stack.imgur.com/aztIb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/aztIb.png" alt="enter image description here" /></a></p>