def test_plotting_integration():
mdp = examples.build_SB_example35()
trajectories = []
for _ in range(3): # 3 trajectories
trajectory = [mdp.reset()]
for _ in range(10): # 10 steps maximum
state, reward, done, info = mdp.step(
random.sample(
[actions.LEFT, actions.RIGHT, actions.UP, actions.DOWN],
1)[0])
trajectory.append(state)
trajectories.append(trajectory)
gwp = GridWorldPlotter(
mdp.size, mdp.has_absorbing_state
) # alternatively you can use GridWorldPlotter.from_mdp(mdp)
fig = plt.figure(figsize=(10, 4))
ax = fig.add_subplot(121)
# trajectory
gwp.plot_trajectories(ax, trajectories)
gwp.plot_grid(ax)
# heatmap
ax = fig.add_subplot(122)
gwp.plot_heatmap(ax, trajectories)
gwp.plot_grid(ax)
def test_differentiable():
mdp = build_SB_example35()
print(mdp.reward)
# random policy:
policy = np.ones((mdp.P.shape[0], mdp.P.shape[1]))/mdp.P.shape[1]
policy = torch.tensor(policy, requires_grad=True).float()
V_pi = calculate_V_pi(mdp.P, mdp.reward, policy, mdp.discount)
grads = torch.autograd.grad(V_pi.mean(), [policy])
assert grads is not None
for grad in grads:
assert torch.isfinite(grad).all()
assert not torch.equal(grad, torch.tensor(0.0))
def test_V_pi():
mdp = build_SB_example35()
print(mdp.reward)
# random policy:
policy = np.ones((mdp.P.shape[0], mdp.P.shape[1]))/mdp.P.shape[1]
V_pi = calculate_V_pi(mdp.P, mdp.reward, policy, mdp.discount)
assert np.allclose(np.round(V_pi, 1), np.array([3.3, 8.8, 4.4, 5.3, 1.5,
1.5, 3.0, 2.3, 1.9, 0.5,
0.1, 0.7, 0.7, 0.4, -0.4,
-1.0, -0.4, -0.4, -0.6, -1.2,
-1.9, -1.3, -1.2, -1.4, -2.0]))
def test_V_pi():
"""Check if computation works."""
mdp = build_SB_example35()
print(mdp.reward)
# random policy:
policy = np.ones((mdp.P.shape[0], mdp.P.shape[1]))/mdp.P.shape[1]
policy = torch.from_numpy(policy).float()
V_pi = calculate_V_pi(mdp.P, mdp.reward, policy, mdp.discount).detach().numpy()
assert np.allclose(np.round(V_pi, 1), np.array([3.3, 8.8, 4.4, 5.3, 1.5,
1.5, 3.0, 2.3, 1.9, 0.5,
0.1, 0.7, 0.7, 0.4, -0.4,
-1.0, -0.4, -0.4, -0.6, -1.2,
-1.9, -1.3, -1.2, -1.4, -2.0]))
def test_SB_example35():
mdp = build_SB_example35()
mdp.set_current_state_to((0, 0))
state, reward, done, _ = mdp.step(actions.UP)
assert not done
assert reward == -1
assert mdp.unflatten_state(state) == (0, 0)
state, reward, done, _ = mdp.step(actions.RIGHT)
assert not done
assert reward == 0
assert mdp.unflatten_state(state) == (0, 1)
state, reward, done, _ = mdp.step(actions.RIGHT)
assert not done
assert reward == +10
assert mdp.unflatten_state(state) == (4, 1)
def test_gym_int_observation():
env = emdp.emdp_gym.gymify(
examples.build_SB_example35(),
observation_one_hot=False)
state = env.reset()
assert type(state) == int
def __init__(self):
super().__init__(examples.build_SB_example35())
