def benchmark():
log = Logger("data/local_analyses/benchmarks.log", "Benchmarks")
tt = TickTock()
cube_bench = CubeBench(log, tt)
# Cube config variables
cn = int(1e7)
multi_op_size = int(1e4) # Number of states used in multi operations
store_repr()
for repr_ in [True, False]:
set_is2024(repr_)
log.section(
f"Benchmarking cube enviroment with {_repstr()} representation")
tt.profile(f"Benchmarking cube environment, {_repstr()}")
cube_bench.rotate(cn)
cube_bench.multi_rotate(int(cn / multi_op_size), multi_op_size)
cube_bench.onehot(cn)
cube_bench.multi_onehot(int(cn / multi_op_size), multi_op_size)
cube_bench.check_solution(cn)
cube_bench.check_multi_solution(int(cn / multi_op_size), multi_op_size)
tt.end_profile(f"Benchmarking cube environment, {_repstr()}")
restore_repr()
log.section("Benchmark runtime distribution")
log(tt)
def test_tt():
tt = TickTock()
tt.profile("test0")
sleep(.01)
tt.profile("test1")
sleep(.01)
tt.end_profile("test1")
sleep(.01)
tt.end_profile("test0")
assert np.isclose(0.03, tt.profiles["test0"].sum(), 1)
assert np.isclose(0.01, tt.profiles["test1"].sum(), 1)
class Train:
states_per_rollout: int
train_rollouts: np.ndarray
value_losses: np.ndarray
policy_losses: np.ndarray
train_losses: np.ndarray
sol_percents: list
def __init__(self,
rollouts: int,
batch_size: int, # Required to be > 1 when training with batchnorm
rollout_games: int,
rollout_depth: int,
optim_fn,
alpha_update: float,
lr: float,
gamma: float,
update_interval: int,
agent: DeepAgent,
evaluator: Evaluator,
evaluation_interval: int,
with_analysis: bool,
tau: float,
reward_method: str,
policy_criterion = torch.nn.CrossEntropyLoss,
value_criterion = torch.nn.MSELoss,
logger: Logger = NullLogger(),
):
"""Sets up evaluation array, instantiates critera and stores and documents settings
:param bool with_analysis: If true, a number of statistics relating to loss behaviour and model output are stored.
:param float alpha_update: alpha <- alpha + alpha_update every update_interval rollouts (excl. rollout 0)
:param float gamma: lr <- lr * gamma every update_interval rollouts (excl. rollout 0)
:param float tau: How much of the new network to use to generate ADI data
"""
self.rollouts = rollouts
self.train_rollouts = np.arange(self.rollouts)
self.batch_size = self.states_per_rollout if not batch_size else batch_size
self.rollout_games = rollout_games
self.rollout_depth = rollout_depth
self.adi_ff_batches = 1 # Number of batches used for feedforward in ADI_traindata. Used to limit vram usage
self.reward_method = reward_method
# Perform evaluation every evaluation_interval and after last rollout
if evaluation_interval:
self.evaluation_rollouts = np.arange(0, self.rollouts, evaluation_interval)-1
if evaluation_interval == 1:
self.evaluation_rollouts = self.evaluation_rollouts[1:]
else:
self.evaluation_rollouts[0] = 0
if self.rollouts-1 != self.evaluation_rollouts[-1]:
self.evaluation_rollouts = np.append(self.evaluation_rollouts, self.rollouts-1)
else:
self.evaluation_rollouts = np.array([])
self.agent = agent
self.tau = tau
self.alpha_update = alpha_update
self.lr = lr
self.gamma = gamma
self.update_interval = update_interval # How often alpha and lr are updated
self.optim = optim_fn
self.policy_criterion = policy_criterion(reduction='none')
self.value_criterion = value_criterion(reduction='none')
self.evaluator = evaluator
self.log = logger
self.log("\n".join([
"Created trainer",
f"Alpha update: {self.alpha_update:.2f}",
f"Learning rate and gamma: {self.lr} and {self.gamma}",
f"Learning rate and alpha will update every {self.update_interval} rollouts: lr <- {self.gamma:.4f} * lr and alpha += {self.alpha_update:.4f}"\
if self.update_interval else "Learning rate and alpha will not be updated during training",
f"Optimizer: {self.optim}",
f"Policy and value criteria: {self.policy_criterion} and {self.value_criterion}",
f"Rollouts: {self.rollouts}",
f"Batch size: {self.batch_size}",
f"Rollout games: {self.rollout_games}",
f"Rollout depth: {self.rollout_depth}",
f"alpha update: {self.alpha_update}",
]))
self.with_analysis = with_analysis
if self.with_analysis:
self.analysis = TrainAnalysis(self.evaluation_rollouts, self.rollout_games, self.rollout_depth, extra_evals=100, reward_method=reward_method, logger=self.log) #Logger should not be set in standard use
self.tt = TickTock()
def train(self, net: Model) -> (Model, Model):
""" Training loop: generates data, optimizes parameters, evaluates (sometimes) and repeats.
Trains `net` for `self.rollouts` rollouts each consisting of `self.rollout_games` games and scrambled `self.rollout_depth`.
The network is evaluated for each rollout number in `self.evaluations` according to `self.evaluator`.
Stores multiple performance and training results.
:param torch.nn.Model net: The network to be trained. Must accept input consistent with cube.get_oh_size()
:return: The network after all evaluations and the network with the best evaluation score (win fraction)
:rtype: (torch.nn.Model, torch.nn.Model)
"""
self.tt.reset()
self.tt.tick()
self.states_per_rollout = self.rollout_depth * self.rollout_games
self.log(f"Beginning training. Optimization is performed in batches of {self.batch_size}")
self.log("\n".join([
f"Rollouts: {self.rollouts}",
f"Each consisting of {self.rollout_games} games with a depth of {self.rollout_depth}",
f"Evaluations: {len(self.evaluation_rollouts)}",
]))
best_solve = 0
best_net = net.clone()
self.agent.net = net
if self.with_analysis:
self.analysis.orig_params = net.get_params()
generator_net = net.clone()
alpha = 1 if self.alpha_update == 1 else 0
optimizer = self.optim(net.parameters(), lr=self.lr)
lr_scheduler = torch.optim.lr_scheduler.StepLR(optimizer, 1, self.gamma)
self.policy_losses = np.zeros(self.rollouts)
self.value_losses = np.zeros(self.rollouts)
self.train_losses = np.empty(self.rollouts)
self.sol_percents = list()
for rollout in range(self.rollouts):
reset_cuda()
generator_net = self._update_gen_net(generator_net, net) if self.tau != 1 else net
self.tt.profile("ADI training data")
training_data, policy_targets, value_targets, loss_weights = self.ADI_traindata(generator_net, alpha)
self.tt.profile("To cuda")
training_data = training_data.to(gpu)
policy_targets = policy_targets.to(gpu)
value_targets = value_targets.to(gpu)
loss_weights = loss_weights.to(gpu)
self.tt.end_profile("To cuda")
self.tt.end_profile("ADI training data")
reset_cuda()
self.tt.profile("Training loop")
net.train()
batches = self._get_batches(self.states_per_rollout, self.batch_size)
for i, batch in enumerate(batches):
optimizer.zero_grad()
policy_pred, value_pred = net(training_data[batch], policy=True, value=True)
# Use loss on both policy and value
policy_loss = self.policy_criterion(policy_pred, policy_targets[batch]) * loss_weights[batch]
value_loss = self.value_criterion(value_pred.squeeze(), value_targets[batch]) * loss_weights[batch]
loss = torch.mean(policy_loss + value_loss)
loss.backward()
optimizer.step()
self.policy_losses[rollout] += policy_loss.detach().cpu().numpy().mean() / len(batches)
self.value_losses[rollout] += value_loss.detach().cpu().numpy().mean() / len(batches)
if self.with_analysis: #Save policy output to compute entropy
with torch.no_grad():
self.analysis.rollout_policy.append(
torch.nn.functional.softmax(policy_pred.detach(), dim=0).cpu().numpy()
)
self.train_losses[rollout] = (self.policy_losses[rollout] + self.value_losses[rollout])
self.tt.end_profile("Training loop")
# Updates learning rate and alpha
if rollout and self.update_interval and rollout % self.update_interval == 0:
if self.gamma != 1:
lr_scheduler.step()
lr = optimizer.param_groups[0]["lr"]
self.log(f"Updated learning rate from {lr/self.gamma:.2e} to {lr:.2e}")
if (alpha + self.alpha_update <= 1 or np.isclose(alpha + self.alpha_update, 1)) and self.alpha_update:
alpha += self.alpha_update
self.log(f"Updated alpha from {alpha-self.alpha_update:.2f} to {alpha:.2f}")
elif alpha < 1 and alpha + self.alpha_update > 1 and self.alpha_update:
self.log(f"Updated alpha from {alpha:.2f} to 1")
alpha = 1
if self.log.is_verbose() or rollout in (np.linspace(0, 1, 20)*self.rollouts).astype(int):
self.log(f"Rollout {rollout} completed with mean loss {self.train_losses[rollout]}")
if self.with_analysis:
self.tt.profile("Analysis of rollout")
self.analysis.rollout(net, rollout, value_targets)
self.tt.end_profile("Analysis of rollout")
if rollout in self.evaluation_rollouts:
net.eval()
self.agent.net = net
self.tt.profile(f"Evaluating using agent {self.agent}")
with unverbose:
eval_results, _, _ = self.evaluator.eval(self.agent)
eval_reward = (eval_results != -1).mean()
self.sol_percents.append(eval_reward)
self.tt.end_profile(f"Evaluating using agent {self.agent}")
if eval_reward > best_solve:
best_solve = eval_reward
best_net = net.clone()
self.log(f"Updated best net with solve rate {eval_reward*100:.2f} % at depth {self.evaluator.scrambling_depths}")
self.log.section("Finished training")
if len(self.evaluation_rollouts):
self.log(f"Best net solves {best_solve*100:.2f} % of games at depth {self.evaluator.scrambling_depths}")
self.log.verbose("Training time distribution")
self.log.verbose(self.tt)
total_time = self.tt.tock()
eval_time = self.tt.profiles[f'Evaluating using agent {self.agent}'].sum() if len(self.evaluation_rollouts) else 0
train_time = self.tt.profiles["Training loop"].sum()
adi_time = self.tt.profiles["ADI training data"].sum()
nstates = self.rollouts * self.rollout_games * self.rollout_depth * cube.action_dim
states_per_sec = int(nstates / (adi_time+train_time))
self.log("\n".join([
f"Total running time: {self.tt.stringify_time(total_time, TimeUnit.second)}",
f"- Training data for ADI: {self.tt.stringify_time(adi_time, TimeUnit.second)} or {adi_time/total_time*100:.2f} %",
f"- Training time: {self.tt.stringify_time(train_time, TimeUnit.second)} or {train_time/total_time*100:.2f} %",
f"- Evaluation time: {self.tt.stringify_time(eval_time, TimeUnit.second)} or {eval_time/total_time*100:.2f} %",
f"States witnessed incl. substates: {TickTock.thousand_seps(nstates)}",
f"- Per training second: {TickTock.thousand_seps(states_per_sec)}",
]))
return net, best_net
def _get_adi_ff_slices(self):
data_points = self.rollout_games * self.rollout_depth * cube.action_dim
slice_size = data_points // self.adi_ff_batches + 1
# Final slice may have overflow, however this is simply ignored when indexing
slices = [slice(i*slice_size, (i+1)*slice_size) for i in range(self.adi_ff_batches)]
return slices
@no_grad
def ADI_traindata(self, net, alpha: float):
""" Training data generation
Implements Autodidactic Iteration as per McAleer, Agostinelli, Shmakov and Baldi, "Solving the Rubik's Cube Without Human Knowledge" section 4.1
Loss weighting is dependant on `self.loss_weighting`.
:param torch.nn.Model net: The network used for generating the training data. This should according to ADI be the network from the last rollout.
:param int rollout: The current rollout number. Used in adaptive loss weighting.
:return: Games * sequence_length number of observations divided in four arrays
- states contains the rubiks state for each data point
- policy_targets and value_targets contains optimal value and policy targets for each training point
- loss_weights contains the weight for each training point (see weighted samples subsection of McAleer et al paper)
:rtype: (torch.Tensor, torch.Tensor, torch.Tensor, torch.Tensor)
"""
net.eval()
self.tt.profile("Scrambling")
# Only include solved state in training if using Max Lapan convergence fix
states, oh_states = cube.sequence_scrambler(self.rollout_games, self.rollout_depth, with_solved = self.reward_method == 'lapanfix')
self.tt.end_profile("Scrambling")
# Keeps track of solved states - Max Lapan's convergence fix
solved_scrambled_states = cube.multi_is_solved(states)
# Generates possible substates for all scrambled states. Shape: n_states*action_dim x *Cube_shape
self.tt.profile("ADI substates")
substates = cube.multi_rotate(np.repeat(states, cube.action_dim, axis=0), *cube.iter_actions(len(states)))
self.tt.end_profile("ADI substates")
self.tt.profile("One-hot encoding")
substates_oh = cube.as_oh(substates)
self.tt.end_profile("One-hot encoding")
self.tt.profile("Reward")
solved_substates = cube.multi_is_solved(substates)
# Reward for won state is 1 normally but 0 if running with reward0
rewards = (torch.zeros if self.reward_method == 'reward0' else torch.ones)\
(*solved_substates.shape)
rewards[~solved_substates] = -1
self.tt.end_profile("Reward")
# Generates policy and value targets
self.tt.profile("ADI feedforward")
while True:
try:
value_parts = [net(substates_oh[slice_], policy=False, value=True).squeeze() for slice_ in self._get_adi_ff_slices()]
values = torch.cat(value_parts).cpu()
break
except RuntimeError as e: # Usually caused by running out of vram. If not, the error is still raised, else batch size is reduced
if "alloc" not in str(e):
raise e
self.log.verbose(f"Intercepted RuntimeError {e}\nIncreasing number of ADI feed forward batches from {self.adi_ff_batches} to {self.adi_ff_batches*2}")
self.adi_ff_batches *= 2
self.tt.end_profile("ADI feedforward")
self.tt.profile("Calculating targets")
values += rewards
values = values.reshape(-1, 12)
policy_targets = torch.argmax(values, dim=1)
value_targets = values[np.arange(len(values)), policy_targets]
if self.reward_method == 'lapanfix':
# Trains on goal state, sets goalstate to 0
value_targets[solved_scrambled_states] = 0
elif self.reward_method == 'schultzfix':
# Does not train on goal state, but sets first 12 substates to 0
first_substates = np.zeros(len(states), dtype=bool)
first_substates[np.arange(0, len(states), self.rollout_depth)] = True
value_targets[first_substates] = 0
self.tt.end_profile("Calculating targets")
# Weighting examples according to alpha
weighted = np.tile(1 / np.arange(1, self.rollout_depth+1), self.rollout_games)
unweighted = np.ones_like(weighted)
ws, us = weighted.sum(), len(unweighted)
loss_weights = ((1-alpha) * weighted / ws + alpha * unweighted / us) * (ws + us)
if self.with_analysis:
self.tt.profile("ADI analysis")
self.analysis.ADI(values)
self.tt.end_profile("ADI analysis")
return oh_states, policy_targets, value_targets, torch.from_numpy(loss_weights).float()
def _update_gen_net(self, generator_net: Model, net: Model):
"""Create a network with parameters weighted by self.tau"""
self.tt.profile("Creating generator network")
genparams, netparams = generator_net.state_dict(), net.state_dict()
new_genparams = dict(genparams)
for pname, param in netparams.items():
new_genparams[pname].data.copy_(
self.tau * param.data.to(gpu) + (1-self.tau) * new_genparams[pname].data.to(gpu)
)
generator_net.load_state_dict(new_genparams)
self.tt.end_profile("Creating generator network")
return generator_net.to(gpu)
def plot_training(self, save_dir: str, name: str, semi_logy=False, show=False):
"""
Visualizes training by showing training loss + evaluation reward in same plot
"""
self.log("Making plot of training")
fig, loss_ax = plt.subplots(figsize=(23, 10))
colour = "red"
loss_ax.set_ylabel("Training loss")
loss_ax.plot(self.train_rollouts, self.train_losses, linewidth=3, color=colour, label="Training loss")
loss_ax.plot(self.train_rollouts, self.policy_losses, linewidth=2, linestyle="dashdot", color="orange", label="Policy loss")
loss_ax.plot(self.train_rollouts, self.value_losses, linewidth=2, linestyle="dashed", color="green", label="Value loss")
loss_ax.tick_params(axis='y', labelcolor=colour)
loss_ax.set_xlabel(f"Rollout, each of {TickTock.thousand_seps(self.states_per_rollout)} states")
loss_ax.set_ylim(np.array([-0.05*1.35, 1.35]) * self.train_losses.max())
h1, l1 = loss_ax.get_legend_handles_labels()
if len(self.evaluation_rollouts):
color = 'blue'
reward_ax = loss_ax.twinx()
reward_ax.set_ylim([-5, 105])
reward_ax.set_ylabel("Solve rate (~95 % CI) [%]")
sol_shares = np.array(self.sol_percents)
bernoulli_errors = bernoulli_error(sol_shares, self.evaluator.n_games, alpha=0.05)
reward_ax.errorbar(self.evaluation_rollouts, sol_shares*100, bernoulli_errors*100, fmt="-o",
capsize=10, color=color, label="Policy performance", errorevery=2, alpha=0.8)
reward_ax.tick_params(axis='y', labelcolor=color)
h2, l2 = reward_ax.get_legend_handles_labels()
h1 += h2
l1 += l2
loss_ax.legend(h1, l1, loc=2)
title = (f"Training - {TickTock.thousand_seps(self.rollouts*self.rollout_games*self.rollout_depth)} states")
plt.title(title)
fig.tight_layout()
if semi_logy: plt.semilogy()
plt.grid(True)
os.makedirs(save_dir, exist_ok=True)
path = os.path.join(save_dir, f"training_{name}.png")
plt.savefig(path)
self.log(f"Saved loss and evaluation plot to {path}")
if show: plt.show()
plt.clf()
@staticmethod
def _get_batches(size: int, bsize: int):
"""
Generates indices for batch
"""
nbatches = int(np.ceil(size/bsize))
idcs = np.arange(size)
np.random.shuffle(idcs)
batches = [slice(batch*bsize, (batch+1)*bsize) for batch in range(nbatches)]
batches[-1] = slice(batches[-1].start, size)
return batches
class Evaluator:
def __init__(self,
n_games,
scrambling_depths: range or list,
max_time = None, # Max time to completion per game
max_states = None, # The max number of states to explore per game
logger: Logger = NullLogger()
):
self.n_games = n_games
self.max_time = max_time
self.max_states = max_states
self.tt = TickTock()
self.log = logger
# Use array of scrambling of scrambling depths if not deep evaluation else just a one element array with 0
self.scrambling_depths = np.array(scrambling_depths) if scrambling_depths != range(0) else np.array([0])
self.log("\n".join([
"Creating evaluator",
f"Games per scrambling depth: {self.n_games}",
f"Scrambling depths: {scrambling_depths if self._isdeep() else 'Uniformly sampled in [100, 999]'}",
]))
def _isdeep(self):
return self.scrambling_depths.size == 1 and self.scrambling_depths[0] == 0
def approximate_time(self):
return self.max_time * self.n_games * len(self.scrambling_depths)
def _eval_game(self, agent: agents.Agent, depth: int, profile: str):
turns_to_complete = -1 # -1 for unfinished
state, _, _ = cube.scramble(depth, True)
self.tt.profile(profile)
solution_found = agent.search(state, self.max_time, self.max_states)
dt = self.tt.end_profile(profile)
if solution_found: turns_to_complete = len(agent.action_queue)
return turns_to_complete, dt
def eval(self, agent: agents.Agent) -> (np.ndarray, np.ndarray, np.ndarray):
"""
Evaluates an agent
Returns results which is an a len(self.scrambling_depths) x self.n_games matrix
Each entry contains the number of steps needed to solve the scrambled cube or -1 if not solved
"""
self.log.section(f"Evaluation of {agent}")
self.log("\n".join([
f"{self.n_games*len(self.scrambling_depths)} cubes",
f"Maximum solve time per cube is {TickTock.stringify_time(self.max_time, TimeUnit.second)} "
f"and estimated total time <= {TickTock.stringify_time(self.approximate_time(), TimeUnit.minute)}" if self.max_time else "No time limit given",
f"Maximum number of explored states is {TickTock.thousand_seps(self.max_states)}" if self.max_states else "No max states given",
]))
res = []
states = []
times = []
for d in self.scrambling_depths:
for _ in range(self.n_games):
if self._isdeep(): # Randomly sample evaluation depth for deep evaluations
d = np.random.randint(100, 1000)
p = f"Evaluation of {agent}. Depth {'100 - 999' if self._isdeep() else d}"
r, dt = self._eval_game(agent, d, p)
res.append(r)
states.append(len(agent))
times.append(dt)
if not self._isdeep():
self.log.verbose(f"Performed evaluation at depth: {d}/{self.scrambling_depths[-1]}")
res = np.reshape(res, (len(self.scrambling_depths), self.n_games))
states = np.reshape(states, (len(self.scrambling_depths), self.n_games))
times = np.reshape(times, (len(self.scrambling_depths), self.n_games))
self.log(f"Evaluation results")
for i, d in enumerate(self.scrambling_depths):
self.log_this_depth(res[i], states[i], times[i], d)
self.log.verbose(f"Evaluation runtime\n{self.tt}")
return res, states, times
def log_this_depth(self, res: np.ndarray, states: np.ndarray, times: np.ndarray, depth: int):
"""Logs summary statistics for given depth
:param res: Vector of results
:param states: Vector of seen states for each game
:param times: Vector of runtimes for each game
:param depth: Scrambling depth at which results were generated
"""
share_completed = np.count_nonzero(res!=-1)*100/len(res)
won_games = res[res!=-1]
self.log(f"Scrambling depth {depth if depth else 'deep'}", with_timestamp=False)
self.log(
f"\tShare completed: {share_completed:.2f} % {bernoulli_error(share_completed/100, len(res), 0.05, stringify=True)} (approx. 95 % CI)",
with_timestamp=False
)
if won_games.size:
mean_turns = won_games.mean()
median_turns = np.median(won_games)
std_turns = won_games.std()
self.log(
f"\tTurns to win: {mean_turns:.2f} +/- {std_turns:.1f} (std.), Median: {median_turns:.0f}",
with_timestamp=False
)
safe_times = times != 0
states_per_sec = states[safe_times] / times[safe_times]
self.log(
f"\tStates seen: Pr. game: {states.mean():.2f} +/- {states.std():.0f} (std.), "\
f"Pr. sec.: {states_per_sec.mean():.2f} +/- {states_per_sec.std():.0f} (std.)", with_timestamp=False)
self.log(f"\tTime: {times.mean():.2f} +/- {times.std():.2f} (std.)", with_timestamp=False)
@classmethod
def plot_evaluators(cls, eval_results: dict, eval_states: dict, eval_times: dict, eval_settings: dict, save_dir: str, title: str='') -> list:
"""
Plots evaluation results
:param eval_results: { agent name: [steps to solve, -1 for unfinished] }
:param eval_states: { agent name: [states seen during solving] }
:param eval_times: { agent name: [time spent solving] }
:param eval_settings: { agent name: { 'n_games': int, 'max_time': float, 'max_states': int, 'scrambling_depths': np.ndarray } }
:param save_dir: Directory in which to save plots
:param title: If given, overrides auto generated title in (depth, winrate) plot
:return: Locations of saved plots
"""
assert eval_results.keys() == eval_results.keys() == eval_times.keys() == eval_settings.keys(), "Keys of evaluation dictionaries should match"
os.makedirs(save_dir, exist_ok=True)
tab_colours = list(mcolour.TABLEAU_COLORS)
colours = [tab_colours[i%len(tab_colours)] for i in range(len(eval_results))]
save_paths = [
cls._plot_depth_win(eval_results, save_dir, eval_settings, colours, title),
cls._sol_length_boxplots(eval_results, save_dir, eval_settings, colours),
]
# Only plot (time, winrate), (states, winrate), and their distributions if settings are the same
if all(cls.check_equal_settings(eval_settings)):
d = cls._get_a_value(eval_settings)["scrambling_depths"][-1]
save_paths.extend([
cls._time_states_winrate_plot(eval_results, eval_times, True, d, save_dir, eval_settings, colours),
cls._time_states_winrate_plot(eval_results, eval_states, False, d, save_dir, eval_settings, colours),
])
p = cls._distribution_plots(eval_results, eval_times, eval_states, d, save_dir, eval_settings, colours)
if p != "ERROR":
save_paths.extend(p)
return save_paths
@classmethod
def _plot_depth_win(cls, eval_results: dict, save_dir: str, eval_settings: dict, colours: list, title: str='') -> str:
# depth, win%-graph
games_equal, times_equal = cls.check_equal_settings(eval_settings)
fig, ax = plt.subplots(figsize=(19.2, 10.8))
ax.set_ylabel(f"Percentage of {cls._get_a_value(eval_settings)['n_games']} games won" if games_equal else "Percentage of games won")
ax.set_xlabel(f"Scrambling depth: Number of random rotations applied to cubes")
ax.locator_params(axis='x', integer=True, tight=True)
for i, (agent, results) in enumerate(eval_results.items()):
used_settings = eval_settings[agent]
color = colours[i]
win_percentages = (results != -1).mean(axis=1) * 100
ax.plot(used_settings['scrambling_depths'], win_percentages, linestyle='dashdot', color=color)
ax.scatter(used_settings['scrambling_depths'], win_percentages, color=color, label=agent)
ax.legend()
ax.set_ylim([-5, 105])
ax.grid(True)
ax.set_title(title if title else (f"Percentage of cubes solved in {cls._get_a_value(eval_settings)['max_time']:.2f} seconds" if times_equal else "Cubes solved"))
fig.tight_layout()
path = os.path.join(save_dir, "eval_winrates.png")
plt.savefig(path)
plt.clf()
return path
@classmethod
def _sol_length_boxplots(cls, eval_results: dict, save_dir: str, eval_settings: dict, colours: list) -> str:
# Solution length boxplots
plt.rcParams.update(rc_params_small)
max_width = 2
width = min(len(eval_results), max_width)
height = (len(eval_results)+1) // width if width == max_width else 1
positions = [(i, j) for i in range(height) for j in range(width)]
fig, axes = plt.subplots(height, width, figsize=(width*10, height*6))
max_sollength = 50
agents, agent_results = list(zip(*eval_results.items()))
agent_results = tuple(x.copy() for x in agent_results)
for res in agent_results:
res[res > max_sollength] = max_sollength
ylim = np.array([-0.02, 1.02]) * max([res.max() for res in agent_results])
min_ = min([x["scrambling_depths"][0] for x in eval_settings.values()])
max_ = max([x["scrambling_depths"][-1] for x in eval_settings.values()])
xticks = np.arange(min_, max_+1, max(np.ceil((max_-min_+1)/8).astype(int), 1))
for used_settings, (i, position) in zip(eval_settings.values(), enumerate(positions)):
# Make sure axes are stored in a matrix, so they are easire to work with, and select axes object
if len(eval_results) == 1:
axes = np.array([[axes]])
elif len(eval_results) <= width and i == 0:
axes = np.expand_dims(axes, 0)
ax = axes[position]
if position[1] == 0:
ax.set_ylabel(f"Solution length")
if position[0] == height - 1 or len(eval_results) <= width:
ax.set_xlabel(f"Scrambling depth")
ax.locator_params(axis="y", integer=True, tight=True)
try:
agent, results = agents[i], agent_results[i]
assert type(agent) == str, str(type(agent))
ax.set_title(agent if axes.size > 1 else "Solution lengths for " + agent)
results = [depth[depth != -1] for depth in results]
ax.boxplot(results)
ax.grid(True)
except IndexError:
pass
ax.set_ylim(ylim)
ax.set_xlim([used_settings["scrambling_depths"].min()-1, used_settings["scrambling_depths"].max()+1])
plt.setp(axes, xticks=xticks, xticklabels=[str(x) for x in xticks])
plt.rcParams.update(rc_params)
if axes.size > 1:
fig.suptitle("Solution lengths")
fig.tight_layout()
fig.subplots_adjust(top=0.88)
path = os.path.join(save_dir, "eval_sollengths.png")
plt.savefig(path)
plt.clf()
return path
@classmethod
def _time_states_winrate_plot(cls, eval_results: dict, eval_times_or_states: dict, is_times: bool,
depth: int, save_dir: str, eval_settings: dict, colours: list) -> str:
# Make a (time spent, winrate) plot if is_times else (states explored, winrate)
# Only done for the deepest configuration
plt.figure(figsize=(19.2, 10.8))
max_value = 0
for (agent, res), values, colour in zip(eval_results.items(), eval_times_or_states.values(), colours):
sort_idcs = np.argsort(values.ravel()) # Use values from all different depths - mainly for deep evaluation
wins, values = (res != -1).ravel()[sort_idcs], values.ravel()[sort_idcs]
max_value = max(max_value, values.max())
cumulative_winrate = np.cumsum(wins) / len(wins) * 100
plt.plot(values, cumulative_winrate, "o-", linewidth=3, color=colour, label=agent)
plt.xlabel("Time used [s]" if is_times else "States explored")
plt.ylabel("Winrate [%]")
plt.xlim([-0.05*max_value, 1.05*max_value])
plt.ylim([-5, 105])
plt.legend()
plt.title(f"Winrate against {'time used for' if is_times else 'states seen during'} solving at depth {depth if depth else '100 - 999'}")
plt.grid(True)
plt.tight_layout()
path = os.path.join(save_dir, "time_winrate.png" if is_times else "states_winrate.png")
plt.savefig(path)
plt.clf()
return path
@classmethod
def _distribution_plots(cls, eval_results: dict, eval_times: dict, eval_states: dict, depth: int,
save_dir: str, eval_settings: dict, colours: list) -> str:
"""Histograms of solution length, time used, and states explored for won games"""
normal_pdf = lambda x, mu, sigma: np.exp(-1/2 * ((x-mu)/sigma)**2) / (sigma * np.sqrt(2*np.pi))
won_games = { agent: (res != -1).ravel() for agent, res in eval_results.items() }
if all(w.sum() <= 1 for w in won_games.values()):
return "ERROR"
eval_results = { agent: res.ravel()[won_games[agent]] for agent, res in eval_results.items() if won_games[agent].sum() > 1 }
eval_times = { agent: times.ravel()[won_games[agent]] for agent, times in eval_times.items() if won_games[agent].sum() > 1 }
eval_states = { agent: states.ravel()[won_games[agent]] for agent, states in eval_states.items() if won_games[agent].sum() > 1 }
eval_data = [eval_results, eval_times, eval_states]
x_labels = ["Solution length", "Time used [s]", "States seen"]
titles = ["Distribution of solution lengths for solved cubes",
"Distribution of time used for solved cubes",
"Distribution of states seen for solved cubes"]
paths = [os.path.join(save_dir, x) + ".png" for x in ["solve_length_dist", "time_dist", "state_dist"]]
paths_iter = iter(paths)
for data, xlab, title, path in zip(eval_data, x_labels, titles, paths):
plt.figure(figsize=(19.2, 10.8))
agents = list(data.keys())
values = [data[agent] for agent in agents]
apply_to_values = lambda fun: fun([fun(v) for v in values])
mus, sigmas = np.array([v.mean() for v in values]), np.array([v.std() for v in values])
min_, max_ = apply_to_values(np.min), apply_to_values(np.max)
if xlab == "Solution length":
lower, higher = min_ - 2, max_ + 2
else:
lower = min_ - (max_ - min_) * 0.1
higher = max_ + (max_ - min_) * 0.1
highest_y = 0
for i, (agent, v) in enumerate(zip(agents, values)):
bins = np.arange(lower, higher+1) if xlab == "Solution length" else int(np.sqrt(len(v))*2) + 1
heights, _, _ = plt.hist(x=v, bins=bins, density=True, color=colours[i], edgecolor="black", linewidth=2,
alpha=0.5, align="left" if xlab == "Solution length" else "mid", label=f"{agent}: {mus[i]:.2f}")
highest_y = max(highest_y, np.max(heights))
if xlab == "Solution length":
for i in range(len(data)):
if sigmas[i] > 0:
x = np.linspace(lower, higher, 1000)
y = normal_pdf(x, mus[i], sigmas[i])
x = x[~np.isnan(y)]
y = y[~np.isnan(y)]
plt.plot(x, y, color="black", linewidth=9)
plt.plot(x, y, color=colours[i], linewidth=5)
highest_y = max(highest_y, y.max())
plt.xlim([lower, higher])
plt.ylim([0, highest_y*(1+0.1*max(3, len(eval_results)))]) # To make room for labels
plt.xlabel(xlab)
plt.ylabel("Frequency")
plt.title(f"{title} at depth {depth if depth else '100 - 999'}")
plt.legend()
plt.savefig(next(paths_iter))
plt.clf()
return paths
@staticmethod
def _get_a_value(obj: dict):
"""Returns a vaue from the object"""
return obj[list(obj.keys())[0]]
@staticmethod
def check_equal_settings(eval_settings: dict):
"""Super simple looper just to hide the ugliness"""
games, times = list(), list()
for setting in eval_settings.values():
games.append(setting['max_time'])
times.append(setting['n_games'])
return games.count(games[0]) == len(games), times.count(times[0]) == len(times)