Merge pull request matplotlib#23772 from scottshambaugh/3d_whats_new

3d plots what's new cleanups

Author: oscargus

doc/users/next_whats_new/3d_plot_aspects.rst

@@ -27,6 +27,7 @@ Users can set the aspect ratio for the X, Y, Z axes of a 3D plot to be 'equal',
     for i, ax in enumerate(axs):
         ax.set_box_aspect((3, 4, 5))
         ax.set_aspect(aspects[i])
-        ax.set_title("set_aspect('{aspects[i]}')")
+        ax.set_title(f"set_aspect('{aspects[i]}')")
 
+    fig.set_size_inches(13, 3)
     plt.show()

doc/users/next_whats_new/3d_plot_focal_length.rst

@@ -19,13 +19,13 @@ The focal length can be calculated from a desired FOV via the equation:
 
     from mpl_toolkits.mplot3d import axes3d
     import matplotlib.pyplot as plt
-    fig, axs = plt.subplots(1, 3, subplot_kw={'projection': '3d'},
-                            constrained_layout=True)
+    from numpy import inf
+    fig, axs = plt.subplots(1, 3, subplot_kw={'projection': '3d'})
     X, Y, Z = axes3d.get_test_data(0.05)
-    focal_lengths = [0.25, 1, 4]
+    focal_lengths = [0.2, 1, inf]
     for ax, fl in zip(axs, focal_lengths):
         ax.plot_wireframe(X, Y, Z, rstride=10, cstride=10)
         ax.set_proj_type('persp', focal_length=fl)
         ax.set_title(f"focal_length = {fl}")
-    plt.tight_layout()
+    fig.set_size_inches(10, 4)
     plt.show()

doc/users/next_whats_new/3d_plot_roll_angle.rst

@@ -18,4 +18,5 @@ existing 3D plots.
     X, Y, Z = axes3d.get_test_data(0.05)
     ax.plot_wireframe(X, Y, Z, rstride=10, cstride=10)
     ax.view_init(elev=0, azim=0, roll=30)
+    ax.set_title('elev=0, azim=0, roll=30')
     plt.show()