class ActorCritic(object):
def __init__(self, env):
LR_A = 0.001 # learning rate for actor
LR_C = 0.01 # learning rate for critic
num_features = env.observation_space.shape[0]
# num_features = 14
num_actions = env.action_space.shape[0]
self.action_space = env.action_space
sess = tf.Session()
self.actor = Actor(
sess,
n_features=num_features,
action_bound=[env.action_space.low[0], env.action_space.high[0]],
lr=LR_A)
self.critic = Critic(
sess, n_features=num_features, lr=LR_C
) # we need a good teacher, so the teacher should learn faster than the actor
sess.run(tf.global_variables_initializer())
def get_action(self, state, episode_percentage):
# state = state[0:14]
# Sometimes pick random action to explore
if np.random.random() < self.get_exploration_prob(episode_percentage):
# print 'random'
return self.action_space.sample()
else:
# print 'not random'
return self.actor.choose_action(state)[0]
def get_exploration_prob(self, episode_percentage):
# if (episode_percentage > .8):
# epsilon = 0.3
# else:
epsilon = -1 * (episode_percentage**2) + 1
# epsilon = -1 * (episode_percentage - 1) ** 3
# epsilon = -0.8 * (episode_percentage - 1) ** 3 + 0.2
# epsilon = -0.8 * episode_percentage + 1
# print epsilon
return epsilon
def update(self, state, action, reward, new_state):
# state = state[0:14]
# new_state = new_state[0:14]
td_error = self.critic.learn(
state, reward,
new_state) # gradient = grad[r + gamma * V(s_) - V(s)]
# print td_error
self.actor.learn(
state, action,
td_error) # true_gradient = grad[logPi(s,a) * td_error]
def get_name(self):
return 'ActorCritic'
class ActorCriticExperienceReplay(object):
def __init__(self, env):
self.MEMORY_SIZE = 200
self.BATCH_SIZE = 10
LR_A = 0.001 # learning rate for actor
LR_C = 0.01 # learning rate for critic
num_features = env.observation_space.shape[0]
num_actions = env.action_space.shape[0]
self.action_space = env.action_space
sess = tf.Session()
self.actor = Actor(
sess,
n_features=num_features,
action_bound=[env.action_space.low[0], env.action_space.high[0]],
lr=LR_A)
self.critic = Critic(
sess, n_features=num_features, lr=LR_C
) # we need a good teacher, so the teacher should learn faster than the actor
sess.run(tf.global_variables_initializer())
self.replay_memory = []
def get_action(self, state, episode_percentage):
# Sometimes pick random action to explore
if np.random.random() < self.get_exploration_prob(episode_percentage):
return self.action_space.sample()
else:
return self.actor.choose_action(state)[0]
def get_exploration_prob(self, episode_percentage):
return -1 * (episode_percentage**2) + 1
# return -1 * (episode_percentage - 1) ** 3
def update(self, state, action, reward, new_state):
td_error = self.critic.learn(
state, reward,
new_state) # gradient = grad[r + gamma * V(s_) - V(s)]
self.actor.learn(
state, action,
td_error) # true_gradient = grad[logPi(s,a) * td_error]
# Add to replay memory
self.replay_memory.append((state, action, reward, new_state))
if len(self.replay_memory) >= self.MEMORY_SIZE:
self.replay_memory.pop(0)
# Learn from replayed memories
if np.random.random() < 0.5 and len(
self.replay_memory) > self.BATCH_SIZE:
minibatch = random.sample(self.replay_memory, self.BATCH_SIZE)
for (batch_state, batch_action, batch_reward,
batch_new_state) in minibatch:
td_error = self.critic.learn(batch_state, batch_reward,
batch_new_state)
self.actor.learn(batch_state, batch_action, td_error)
def get_name(self):
return 'ActorCritic_ExperienceReplay'
def train(self, max_episode=10, max_path_length=200, verbose=0):
env = self.env
avg_reward_sum = 0.
#f_eps = open("episode.csv","w")
#write_eps = csv.write(f_eps)
for e in range(max_episode):
env._reset()
observation = env._reset()
game_over = False
reward_sum = 0
inputs = []
outputs = []
predicteds = []
rewards = []
#f_iter = open("episode_{0}.csv".format(e),"w")
#write_iter = csv.writer(f_iter)
f_episode = "episode_{0}.csv".format(e)
os.system("rm -rf {0}".format(f_episode))
print(observation[0].shape, observation[1].shape)
sess = tf.Session()
actor = Actor(sess,
n_actions=self.env.action_space.n
# output_graph=True,
)
critic = Critic(
sess, n_actions=self.env.action_space.n
) # we need a good teacher, so the teacher should learn faster than the actor
sess.run(tf.global_variables_initializer())
while not game_over:
action, aprob = actor.choose_action(observation)
inputs.append(observation)
predicteds.append(aprob)
y = np.zeros([self.env.action_space.n])
y[action] = 1.
outputs.append(y)
observation_, reward, actual_reward, game_over, info = self.env._step(
action)
reward_sum += float(actual_reward)
print(reward)
#rewards.append(float(reward))
rewards.append(float(reward))
# After env.step
td_error = critic.learn(
observation, reward_sum,
observation_) # gradient = grad[r + gamma * V(s_) - V(s)]
actor.learn(
observation, action,
td_error) # true_gradient = grad[logPi(s,a) * td_error]
# check memory for RNN model
if len(inputs) > self.max_memory:
del inputs[0]
del outputs[0]
del predicteds[0]
del rewards[0]
if verbose > 0:
if env.actions[action] == "LONG" or env.actions[
action] == "SHORT":
#if env.actions[action] == "LONG" or env.actions[action] == "SHORT" or env.actions[action] == "HOLD":
color = bcolors.FAIL if env.actions[
action] == "LONG" else bcolors.OKBLUE
print("%s:\t%s\t%.2f\t%.2f\t" %
(info["dt"], color + env.actions[action] +
bcolors.ENDC, reward_sum, info["cum"]) +
("\t".join([
"%s:%.2f" % (l, i)
for l, i in zip(env.actions, aprob.tolist())
])))
#write_iter.writerow("%s:\t%s\t%.2f\t%.2f\t" % (info["dt"], env.actions[action], reward_sum, info["cum"]) + ("\t".join(["%s:%.2f" % (l, i) for l, i in zip(env.actions, aprob.tolist())])))
os.system("echo %s >> %s" %
("%s:\t%s\t%.2f\t%.2f\t" %
(info["dt"], env.actions[action], reward_sum,
info["cum"]) +
("\t".join([
"%s:%.2f" % (l, i)
for l, i in zip(env.actions, aprob.tolist())
])), f_episode))
avg_reward_sum = avg_reward_sum * 0.99 + reward_sum * 0.01
toPrint = "%d\t%s\t%s\t%.2f\t%.2f" % (
e, info["code"],
(bcolors.FAIL if reward_sum >= 0 else bcolors.OKBLUE) +
("%.2f" % reward_sum) + bcolors.ENDC, info["cum"],
avg_reward_sum)
print(toPrint)
if self.history_filename != None:
os.system("echo %s >> %s" %
(toPrint, self.history_filename))
dim = len(inputs[0])
inputs_ = [[] for i in range(dim)]
for obs in inputs:
for i, block in enumerate(obs):
inputs_[i].append(block[0])
inputs_ = [np.array(inputs_[i]) for i in range(dim)]
outputs_ = np.vstack(outputs)
predicteds_ = np.vstack(predicteds)
rewards_ = np.vstack(rewards)
print("shape: ", np.shape(rewards))
print("fit model input.shape %s, output.shape %s" %
([inputs_[i].shape
for i in range(len(inputs_))], outputs_.shape))
np.set_printoptions(linewidth=200, suppress=True)
print("currentTargetIndex:", env.currentTargetIndex)
actor = Actor(s_dim=N_S,a_dim=N_A,learning_rate=0.01,sess=sess) critic = Critic(s_dim=N_S,learning_rate=0.05,reward_decay=0.9,sess=sess) sess.run(tf.global_variables_initializer()) for i_episode in range(3000): s = env.reset() t = 0 track_r = [] while True: if RENDER:env.render() a = actor.choose_action(s) s_,r,done,info = env.step(a) if done: r = -20 track_r.append(r) td_error = critic.learn(s,r,s_) actor.learn(s,a,td_error) s = s_ t += 1 if done or t >= 1000: ep_rs_sum = sum(track_r) if 'running_reward' not in globals():
