title: Z-axis label matplotlib vertical direction reads wrong direction - how to rotate up?
body: <p>If you run the code below you will see that the Z-label goes belly up: it read down, but should read up.</p>
  
  <p>I put <code>rotation=0</code> in the parameters, but to no avail.</p>
  
  <p>How to change that?</p>
  
  <pre><code>import numpy as np
  import matplotlib.pyplot as plt
  from mpl_toolkits.mplot3d import Axes3D
  from mpl_toolkits.mplot3d.art3d import Poly3DCollection, Line3DCollection
  from matplotlib import rc
  rc('text', usetex=True)
  
  def plot_cube(cube_definition):
      cube_definition_array = [
          np.array(list(item))
          for item in cube_definition
      ]
  
      points = []
      points += cube_definition_array
      vectors = [
          cube_definition_array[1] - cube_definition_array[0],
          cube_definition_array[2] - cube_definition_array[0],
          cube_definition_array[3] - cube_definition_array[0]
      ]
  
      points += [cube_definition_array[0] + vectors[0] + vectors[1]]
      points += [cube_definition_array[0] + vectors[0] + vectors[2]]
      points += [cube_definition_array[0] + vectors[1] + vectors[2]]
      points += [cube_definition_array[0] + vectors[0] + vectors[1] + vectors[2]]
  
      points = np.array(points)
  
      edges = [
          [points[0], points[3], points[5], points[1]],
          [points[1], points[5], points[7], points[4]],
          [points[4], points[2], points[6], points[7]],
          [points[2], points[6], points[3], points[0]],
          [points[0], points[2], points[4], points[1]],
          [points[3], points[6], points[7], points[5]]
      ]
  
      fig = plt.figure(figsize=(15, 10), facecolor='w')
      ax = fig.add_subplot(111, projection='3d')
  
      faces = Poly3DCollection(edges, linewidths=1, edgecolors='k', linestyles= '--')
      faces.set_facecolor((1,1,1,0.1))
  
      ax.add_collection3d(faces)
  
      # Plot the points themselves to force the scaling of the axes
      ax.scatter(points[:,0], points[:,1], points[:,2], s=0)
  
      ax.set_aspect('equal')
      ax.set_xlabel(r'$(|B|_t)^{\beta_0}$', rotation=0, fontsize=16, labelpad=10)
      ax.set_zlabel(r'$(|E|_t)^{A}$', rotation=0, fontsize=16, labelpad=10)
      ax.set_ylabel(r'$(|D|_t)^{\beta_1}$', rotation=0, fontsize=16, labelpad=10)
      ax.view_init(elev=15, azim=30)
  
  
  cube_definition = [
      (0,0,0), (0,1,0), (1,0,0), (0,0,1)
  ]
  plot_cube(cube_definition)
  </code></pre>