Remove Axes.cla from examples

Also, minor improvement to animation demo.

Author: QuLogic

examples/animation/animation_demo.py

@@ -20,9 +20,9 @@
 
 fig, ax = plt.subplots()
 
-for i in range(len(data)):
-    ax.cla()
-    ax.imshow(data[i])
-    ax.set_title("frame {}".format(i))
+for i, img in enumerate(data):
+    ax.clear()
+    ax.imshow(img)
+    ax.set_title(f"frame {i}")
     # Note that using time.sleep does *not* work here!
     plt.pause(0.1)

examples/event_handling/data_browser.py

@@ -75,7 +75,7 @@ def update(self):
 
         dataind = self.lastind
 
-        ax2.cla()
+        ax2.clear()
         ax2.plot(X[dataind])
 
         ax2.text(0.05, 0.9, f'mu={xs[dataind]:1.3f}\nsigma={ys[dataind]:1.3f}',