Cleanup contour(f)3d examples.

Axes3D.clabel is a noop, so don't use it in examples (perhaps it should
in fact throw a NotImplementedError, but let's not worry about that
here).

Various other small cleanups.

Author: anntzer

examples/mplot3d/contour3d.py

@@ -14,7 +14,6 @@
 ax = plt.figure().add_subplot(projection='3d')
 X, Y, Z = axes3d.get_test_data(0.05)
 
-cset = ax.contour(X, Y, Z, cmap=cm.coolwarm)  # Plot contour curves
-ax.clabel(cset, fontsize=9, inline=True)
+ax.contour(X, Y, Z, cmap=cm.coolwarm)  # Plot contour curves
 
 plt.show()

examples/mplot3d/contour3d_2.py

@@ -13,9 +13,6 @@
 
 ax = plt.figure().add_subplot(projection='3d')
 X, Y, Z = axes3d.get_test_data(0.05)
-
-cset = ax.contour(X, Y, Z, extend3d=True, cmap=cm.coolwarm)
-
-ax.clabel(cset, fontsize=9, inline=True)
+ax.contour(X, Y, Z, extend3d=True, cmap=cm.coolwarm)
 
 plt.show()

examples/mplot3d/contour3d_3.py

@@ -21,17 +21,12 @@
 
 # Plot projections of the contours for each dimension.  By choosing offsets
 # that match the appropriate axes limits, the projected contours will sit on
-# the 'walls' of the graph
-cset = ax.contour(X, Y, Z, zdir='z', offset=-100, cmap=cm.coolwarm)
-cset = ax.contour(X, Y, Z, zdir='x', offset=-40, cmap=cm.coolwarm)
-cset = ax.contour(X, Y, Z, zdir='y', offset=40, cmap=cm.coolwarm)
-
-ax.set_xlim(-40, 40)
-ax.set_ylim(-40, 40)
-ax.set_zlim(-100, 100)
-
-ax.set_xlabel('X')
-ax.set_ylabel('Y')
-ax.set_zlabel('Z')
+# the 'walls' of the graph.
+ax.contour(X, Y, Z, zdir='z', offset=-100, cmap=cm.coolwarm)
+ax.contour(X, Y, Z, zdir='x', offset=-40, cmap=cm.coolwarm)
+ax.contour(X, Y, Z, zdir='y', offset=40, cmap=cm.coolwarm)
+
+ax.set(xlim=(-40, 40), ylim=(-40, 40), zlim=(-100, 100),
+       xlabel='X', ylabel='Y', zlabel='Z')
 
 plt.show()

examples/mplot3d/contourf3d.py

@@ -16,9 +16,6 @@
 
 ax = plt.figure().add_subplot(projection='3d')
 X, Y, Z = axes3d.get_test_data(0.05)
-
-cset = ax.contourf(X, Y, Z, cmap=cm.coolwarm)
-
-ax.clabel(cset, fontsize=9, inline=True)
+ax.contourf(X, Y, Z, cmap=cm.coolwarm)
 
 plt.show()

examples/mplot3d/contourf3d_2.py

@@ -22,16 +22,11 @@
 # Plot projections of the contours for each dimension.  By choosing offsets
 # that match the appropriate axes limits, the projected contours will sit on
 # the 'walls' of the graph
-cset = ax.contourf(X, Y, Z, zdir='z', offset=-100, cmap=cm.coolwarm)
-cset = ax.contourf(X, Y, Z, zdir='x', offset=-40, cmap=cm.coolwarm)
-cset = ax.contourf(X, Y, Z, zdir='y', offset=40, cmap=cm.coolwarm)
+ax.contourf(X, Y, Z, zdir='z', offset=-100, cmap=cm.coolwarm)
+ax.contourf(X, Y, Z, zdir='x', offset=-40, cmap=cm.coolwarm)
+ax.contourf(X, Y, Z, zdir='y', offset=40, cmap=cm.coolwarm)
 
-ax.set_xlim(-40, 40)
-ax.set_ylim(-40, 40)
-ax.set_zlim(-100, 100)
-
-ax.set_xlabel('X')
-ax.set_ylabel('Y')
-ax.set_zlabel('Z')
+ax.set(xlim=(-40, 40), ylim=(-40, 40), zlim=(-100, 100),
+       xlabel='X', ylabel='Y', zlabel='Z')
 
 plt.show()