update

Author: MorvanZhou

README.md

@@ -46,3 +46,10 @@ In these tutorials for reinforcement learning, it covers from the basic RL algor
          alt="Paypal"
          height="auto" ></a>
 </div>
+
+<div>
+  <a href="https://www.patreon.com/morvan">
+    <img src="https://morvanzhou.github.io/static/img/support/patreon.jpg"
+         alt="Patreon"
+         height=120></a>
+</div>

contents/9_Deep_Deterministic_Policy_Gradient_DDPG/DDPG.py

@@ -224,7 +224,7 @@ def sample(self, n):
         if RENDER:
             env.render()
 
-        # Added exploration noise
+        # Add exploration noise
         a = actor.choose_action(s)
         a = np.clip(np.random.normal(a, var), -2, 2)    # add randomness to action selection for exploration
         s_, r, done, info = env.step(a)