def main():
batch_size = 2
pcfg_path = './pcfgs/astronomers_pcfg.json'
generative_model, inference_network, true_generative_model = \
util.init_models(pcfg_path)
obss = [true_generative_model.sample_obs() for _ in range(batch_size)]
num_mc_samples = 100
num_particles_list = [2, 5, 10, 20, 50, 100]
vimco_grad = np.zeros((len(num_particles_list), 2))
vimco_one_grad = np.zeros((len(num_particles_list), 2))
reinforce_grad = np.zeros((len(num_particles_list), 2))
reinforce_one_grad = np.zeros((len(num_particles_list), 2))
two_grad = np.zeros((len(num_particles_list), 2))
log_evidence_stats = np.zeros((len(num_particles_list), 2))
log_evidence_grad = np.zeros((len(num_particles_list), 2))
wake_phi_loss_grad = np.zeros((len(num_particles_list), 2))
log_Q_grad = np.zeros((len(num_particles_list), 2))
sleep_loss_grad = np.zeros((len(num_particles_list), 2))
for i, num_particles in enumerate(num_particles_list):
util.print_with_time('num_particles = {}'.format(num_particles))
(vimco_grad[i], vimco_one_grad[i], reinforce_grad[i],
reinforce_one_grad[i], two_grad[i], log_evidence_stats[i],
log_evidence_grad[i], wake_phi_loss_grad[i], log_Q_grad[i],
sleep_loss_grad[i]) = get_mean_stds(
generative_model, inference_network, num_mc_samples, obss,
num_particles)
util.save_object([
vimco_grad, vimco_one_grad, reinforce_grad, reinforce_one_grad,
two_grad, log_evidence_stats, log_evidence_grad, wake_phi_loss_grad,
log_Q_grad, sleep_loss_grad],
'./variance_analysis/data.pkl')
def load_or_init_models(load_model_folder, pcfg_path):
"""Load/initialize models.
Args:
load_model_folder: string; if '' then will initialize new models
pcfg_path: path to a json spec of a pcfg
Returns: generative_model, inference_network, true_generative_model
"""
if load_model_folder == '':
generative_model, inference_network, true_generative_model = \
util.init_models(args.pcfg_path)
else:
_, _, true_generative_model = util.init_models(args.pcfg_path)
generative_model, inference_network = util.load_models()
return generative_model, inference_network, true_generative_model
def main():
num_mixtures = 20
temp = np.arange(num_mixtures) + 5
true_p_mixture_probs = temp / np.sum(temp)
softmax_multiplier = 0.5
args = argparse.Namespace(
init_mixture_logits=np.array(
list(reversed(2 * np.arange(num_mixtures)))),
softmax_multiplier=softmax_multiplier,
device=torch.device('cpu'),
num_mixtures=num_mixtures,
relaxed_one_hot=False,
temperature=None,
true_mixture_logits=np.log(true_p_mixture_probs) / softmax_multiplier)
batch_size = 2
generative_model, inference_network, true_generative_model = \
util.init_models(args)
obs = true_generative_model.sample_obs(batch_size)
num_mc_samples = 100
num_particles_list = [2, 5, 10, 20, 50, 100]
vimco_grad = np.zeros((len(num_particles_list), 2))
vimco_one_grad = np.zeros((len(num_particles_list), 2))
reinforce_grad = np.zeros((len(num_particles_list), 2))
reinforce_one_grad = np.zeros((len(num_particles_list), 2))
two_grad = np.zeros((len(num_particles_list), 2))
log_evidence_stats = np.zeros((len(num_particles_list), 2))
log_evidence_grad = np.zeros((len(num_particles_list), 2))
wake_phi_loss_grad = np.zeros((len(num_particles_list), 2))
log_Q_grad = np.zeros((len(num_particles_list), 2))
sleep_loss_grad = np.zeros((len(num_particles_list), 2))
for i, num_particles in enumerate(num_particles_list):
util.print_with_time('num_particles = {}'.format(num_particles))
(vimco_grad[i], vimco_one_grad[i], reinforce_grad[i],
reinforce_one_grad[i], two_grad[i], log_evidence_stats[i],
log_evidence_grad[i], wake_phi_loss_grad[i], log_Q_grad[i],
sleep_loss_grad[i]) = get_mean_stds(generative_model,
inference_network, num_mc_samples,
obs, num_particles)
util.save_object([
vimco_grad, vimco_one_grad, reinforce_grad, reinforce_one_grad,
two_grad, log_evidence_stats, log_evidence_grad, wake_phi_loss_grad,
log_Q_grad, sleep_loss_grad
], './variance_analysis/data.pkl')
args.device = torch.device('cpu')
args.num_mixtures = 20
args.init_mixture_logits = np.ones(args.num_mixtures)
args.softmax_multiplier = 0.5
args.relaxed_one_hot = False
args.temperature = None
temp = np.arange(args.num_mixtures) + 5
true_p_mixture_probs = temp / np.sum(temp)
args.true_mixture_logits = \
np.log(true_p_mixture_probs) / args.softmax_multiplier
args.seed = 1
# init models
util.set_seed(args.seed)
generative_model, inference_network, true_generative_model = \
util.init_models(args)
optimizer_phi = torch.optim.Adam(inference_network.parameters())
optimizer_theta = torch.optim.Adam(generative_model.parameters())
batch_size = 3
num_particles = 4
obs = true_generative_model.sample_obs(batch_size)
def get_grads_correct(seed):
util.set_seed(seed)
theta_grads_correct = []
phi_grads_correct = []
log_weight, log_q = losses.get_log_weight_and_log_q(
def run(args):
# set up args
if args.cuda and torch.cuda.is_available():
device = torch.device('cuda')
args.cuda = True
else:
device = torch.device('cpu')
args.cuda = False
if args.train_mode == 'thermo' or args.train_mode == 'thermo_wake':
partition = util.get_partition(args.num_partitions,
args.partition_type, args.log_beta_min,
device)
util.print_with_time('device = {}'.format(device))
util.print_with_time(str(args))
# save args
save_dir = util.get_save_dir()
args_path = util.get_args_path(save_dir)
util.save_object(args, args_path)
# data
binarized_mnist_train, binarized_mnist_valid, binarized_mnist_test = \
data.load_binarized_mnist(where=args.where)
data_loader = data.get_data_loader(binarized_mnist_train, args.batch_size,
device)
valid_data_loader = data.get_data_loader(binarized_mnist_valid,
args.valid_batch_size, device)
test_data_loader = data.get_data_loader(binarized_mnist_test,
args.test_batch_size, device)
train_obs_mean = torch.tensor(np.mean(binarized_mnist_train, axis=0),
device=device,
dtype=torch.float)
# init models
util.set_seed(args.seed)
generative_model, inference_network = util.init_models(
train_obs_mean, args.architecture, device)
# optim
optim_kwargs = {'lr': args.learning_rate}
# train
if args.train_mode == 'ws':
train_callback = train.TrainWakeSleepCallback(
save_dir, args.num_particles * args.batch_size, test_data_loader,
args.eval_num_particles, args.logging_interval,
args.checkpoint_interval, args.eval_interval)
train.train_wake_sleep(generative_model, inference_network,
data_loader, args.num_iterations,
args.num_particles, optim_kwargs,
train_callback)
elif args.train_mode == 'ww':
train_callback = train.TrainWakeWakeCallback(
save_dir, args.num_particles, test_data_loader,
args.eval_num_particles, args.logging_interval,
args.checkpoint_interval, args.eval_interval)
train.train_wake_wake(generative_model, inference_network, data_loader,
args.num_iterations, args.num_particles,
optim_kwargs, train_callback)
elif args.train_mode == 'reinforce' or args.train_mode == 'vimco':
train_callback = train.TrainIwaeCallback(
save_dir, args.num_particles, args.train_mode, test_data_loader,
args.eval_num_particles, args.logging_interval,
args.checkpoint_interval, args.eval_interval)
train.train_iwae(args.train_mode, generative_model, inference_network,
data_loader, args.num_iterations, args.num_particles,
optim_kwargs, train_callback)
elif args.train_mode == 'thermo':
train_callback = train.TrainThermoCallback(
save_dir, args.num_particles, partition, test_data_loader,
args.eval_num_particles, args.logging_interval,
args.checkpoint_interval, args.eval_interval)
train.train_thermo(generative_model, inference_network, data_loader,
args.num_iterations, args.num_particles, partition,
optim_kwargs, train_callback)
elif args.train_mode == 'thermo_wake':
train_callback = train.TrainThermoWakeCallback(
save_dir, args.num_particles, test_data_loader,
args.eval_num_particles, args.logging_interval,
args.checkpoint_interval, args.eval_interval)
train.train_thermo_wake(generative_model, inference_network,
data_loader, args.num_iterations,
args.num_particles, partition, optim_kwargs,
train_callback)
# eval validation
train_callback.valid_log_p, train_callback.valid_kl = train.eval_gen_inf(
generative_model, inference_network, valid_data_loader,
args.eval_num_particles)
# save models and stats
util.save_checkpoint(save_dir,
iteration=None,
generative_model=generative_model,
inference_network=inference_network)
stats_path = util.get_stats_path(save_dir)
util.save_object(train_callback, stats_path)
def plot_model_movie():
num_test_x = 5
num_particles_list = [2, 5, 10, 20]
seed = seed_list[0]
model_folder = util.get_most_recent_model_folder_args_match(
seed=seed_list[0],
train_mode=train_mode_list[0],
num_particles=num_particles_list[0],
init_near=init_near)
args = util.load_object(util.get_args_path(model_folder))
_, _, true_generative_model = util.init_models(args)
test_xs = np.linspace(0, 19, num=num_test_x) * 10
nrows = len(num_particles_list)
ncols = num_test_x + 1
width = 5.5
ax_width = width / ncols
height = nrows * ax_width
fig, axss = plt.subplots(nrows, ncols, sharex=True, sharey=True, dpi=300)
fig.set_size_inches(width, height)
for num_particles_idx, num_particles in enumerate(num_particles_list):
axss[num_particles_idx, 0].set_ylabel('$K = {}$'.format(num_particles),
fontsize=SMALL_SIZE)
handles = [mpatches.Rectangle((0, 0), 1, 1, color='black', label='True')]
for color, label in zip(colors, labels):
handles.append(
mpatches.Rectangle((0, 0), 1, 1, color=color, label=label))
axss[-1, ncols // 2].legend(bbox_to_anchor=(0, -0.05),
loc='upper center',
ncol=len(handles),
handles=handles)
axss[0, 0].set_title(r'$p_\theta(z)$')
for test_x_idx, test_x in enumerate(test_xs):
axss[0, 1 + test_x_idx].set_title(
r'$q_\phi(z | x = {0:.0f})$'.format(test_x))
for ax in axss[-1]:
ax.set_xlabel(r'$z$', labelpad=0.5)
for axs in axss:
for ax in axs:
ax.set_xticks([])
ax.set_xticklabels([])
ax.set_yticks([])
ax.set_yticklabels([])
ax.set_ylim(0, 8)
ax.set_xlim(0, 20)
# title = fig.suptitle('Iteration 0')
t = axss[0, ncols // 2].text(0,
1.23,
'Iteration 0',
horizontalalignment='center',
verticalalignment='center',
transform=axss[0, ncols // 2].transAxes,
fontsize=MEDIUM_SIZE)
fig.tight_layout(pad=0, rect=[0.01, 0.04, 0.99, 0.96])
def update(frame):
result = []
iteration_idx = frame
iteration = iteration_idx * 1000
t.set_text('Iteration {}'.format(iteration))
result.append(t)
for axs in axss:
for ax in axs:
result.append(
ax.add_artist(
mpatches.Rectangle((0, 0), 20, 8, color='white')))
for num_particles_idx, num_particles in enumerate(num_particles_list):
ax = axss[num_particles_idx, 0]
# true generative model
i = 0
plot_hinton(ax,
true_generative_model.get_latent_params().data.numpy(),
8 - i,
8 - i - 1,
0,
20,
color='black')
# learned generative models
for train_mode_idx, train_mode in enumerate(train_mode_list):
label = labels[train_mode_idx]
color = colors[train_mode_idx]
model_folder = util.get_most_recent_model_folder_args_match(
seed=seed,
train_mode=train_mode,
num_particles=num_particles,
init_near=init_near)
if model_folder is not None:
generative_model, _ = util.load_models(model_folder,
iteration=iteration)
if generative_model is not None:
plot_hinton(
ax,
generative_model.get_latent_params().data.numpy(),
8 - train_mode_idx - 1,
8 - train_mode_idx - 2,
0,
20,
label=label,
color=color)
result += ax.artists
# inference network
for test_x_idx, test_x in enumerate(test_xs):
ax = axss[num_particles_idx, test_x_idx + 1]
test_x_tensor = torch.tensor(test_x,
dtype=torch.float,
device=args.device).unsqueeze(0)
# true
plot_hinton(ax,
true_generative_model.get_posterior_probs(
test_x_tensor)[0].data.numpy(),
8 - i,
8 - i - 1,
0,
20,
color='black')
# learned
for train_mode_idx, train_mode in enumerate(train_mode_list):
label = labels[train_mode_idx]
color = colors[train_mode_idx]
model_folder = \
util.get_most_recent_model_folder_args_match(
seed=seed, train_mode=train_mode,
num_particles=num_particles, init_near=init_near)
if model_folder is not None:
_, inference_network = util.load_models(
model_folder, iteration=iteration)
if inference_network is not None:
plot_hinton(ax,
inference_network.get_latent_params(
test_x_tensor)[0].data.numpy(),
8 - train_mode_idx - 1,
8 - train_mode_idx - 2,
0,
20,
label=label,
color=color)
result += ax.artists
return result
anim = FuncAnimation(fig, update, frames=np.arange(100), blit=True)
if not os.path.exists('./plots/'):
os.makedirs('./plots/')
filename = './plots/model_movie.mp4'
anim.save(filename, dpi=300)
print('Saved to {}'.format(filename))
def plot_models():
saving_iterations = np.arange(100) * 1000
num_iterations_to_plot = 3
iterations_to_plot = saving_iterations[np.floor(
np.linspace(0, 99, num=num_iterations_to_plot)).astype(int)]
num_test_x = 3
num_particles_list = [2, 20]
seed = seed_list[0]
model_folder = util.get_most_recent_model_folder_args_match(
seed=seed_list[0],
train_mode=train_mode_list[0],
num_particles=num_particles_list[0],
init_near=init_near)
args = util.load_object(util.get_args_path(model_folder))
_, _, true_generative_model = util.init_models(args)
test_xs = np.linspace(0, 19, num=num_test_x) * 10
nrows = num_iterations_to_plot
ncols = len(num_particles_list) * (num_test_x + 1)
fig, axss = plt.subplots(nrows, ncols, sharex=True, sharey=True)
width = 5.5
ax_width = width / ncols
height = nrows * ax_width
fig.set_size_inches(width, height)
for iteration_idx, iteration in enumerate(iterations_to_plot):
axss[iteration_idx, 0].set_ylabel('Iter. {}'.format(iteration))
for num_particles_idx, num_particles in enumerate(num_particles_list):
ax = axss[iteration_idx, num_particles_idx * (num_test_x + 1)]
ax.set_xticks([])
ax.set_xticklabels([])
ax.set_yticks([])
ax.set_yticklabels([])
ax.set_ylim(0, 8)
ax.set_xlim(0, 20)
if iteration_idx == 0:
ax.set_title(r'$p_\theta(z)$')
# true generative model
i = 0
plot_hinton(ax,
true_generative_model.get_latent_params().data.numpy(),
8 - i,
8 - i - 1,
0,
20,
color='black')
# learned generative models
for train_mode_idx, train_mode in enumerate(train_mode_list):
label = labels[train_mode_idx]
color = colors[train_mode_idx]
model_folder = util.get_most_recent_model_folder_args_match(
seed=seed,
train_mode=train_mode,
num_particles=num_particles,
init_near=init_near)
if model_folder is not None:
generative_model, _ = util.load_models(model_folder,
iteration=iteration)
if generative_model is not None:
plot_hinton(
ax,
generative_model.get_latent_params().data.numpy(),
8 - train_mode_idx - 1,
8 - train_mode_idx - 2,
0,
20,
label=label,
color=color)
# inference network
for test_x_idx, test_x in enumerate(test_xs):
ax = axss[iteration_idx, num_particles_idx * (num_test_x + 1) +
test_x_idx + 1]
ax.set_xticks([])
ax.set_xticklabels([])
ax.set_yticks([])
ax.set_yticklabels([])
ax.set_ylim(0, 8)
ax.set_xlim(0, 20)
test_x_tensor = torch.tensor(test_x,
dtype=torch.float,
device=args.device).unsqueeze(0)
if iteration_idx == 0:
ax.set_title(r'$q_\phi(z | x = {0:.0f})$'.format(test_x))
# true
plot_hinton(ax,
true_generative_model.get_posterior_probs(
test_x_tensor)[0].data.numpy(),
8 - i,
8 - i - 1,
0,
20,
color='black')
# learned
for train_mode_idx, train_mode in enumerate(train_mode_list):
label = labels[train_mode_idx]
color = colors[train_mode_idx]
model_folder = \
util.get_most_recent_model_folder_args_match(
seed=seed, train_mode=train_mode,
num_particles=num_particles, init_near=init_near)
if model_folder is not None:
_, inference_network = util.load_models(
model_folder, iteration=iteration)
if inference_network is not None:
plot_hinton(ax,
inference_network.get_latent_params(
test_x_tensor)[0].data.numpy(),
8 - train_mode_idx - 1,
8 - train_mode_idx - 2,
0,
20,
label=label,
color=color)
for num_particles_idx, num_particles in enumerate(num_particles_list):
ax = axss[0,
num_particles_idx * (num_test_x + 1) + (num_test_x + 1) // 2]
ax.text(0,
1.25,
'$K = {}$'.format(num_particles),
fontsize=SMALL_SIZE,
verticalalignment='bottom',
horizontalalignment='center',
transform=ax.transAxes)
handles = [mpatches.Rectangle((0, 0), 1, 1, color='black', label='True')]
for color, label in zip(colors, labels):
handles.append(
mpatches.Rectangle((0, 0), 1, 1, color=color, label=label))
axss[-1, ncols // 2].legend(bbox_to_anchor=(0, -0.1),
loc='upper center',
ncol=len(handles),
handles=handles)
for ax in axss[-1]:
ax.set_xlabel(r'$z$', labelpad=0.5)
fig.tight_layout(pad=0)
if not os.path.exists('./plots/'):
os.makedirs('./plots/')
filename = './plots/models.pdf'
fig.savefig(filename, bbox_inches='tight')
print('Saved to {}'.format(filename))
def run(args):
# set up args
args.device = None
if args.cuda and torch.cuda.is_available():
args.device = torch.device('cuda')
else:
args.device = torch.device('cpu')
args.num_mixtures = 20
if args.init_near:
args.init_mixture_logits = np.ones(args.num_mixtures)
else:
args.init_mixture_logits = np.array(
list(reversed(2 * np.arange(args.num_mixtures))))
args.softmax_multiplier = 0.5
if args.train_mode == 'concrete':
args.relaxed_one_hot = True
args.temperature = 3
else:
args.relaxed_one_hot = False
args.temperature = None
temp = np.arange(args.num_mixtures) + 5
true_p_mixture_probs = temp / np.sum(temp)
args.true_mixture_logits = \
np.log(true_p_mixture_probs) / args.softmax_multiplier
util.print_with_time(str(args))
# save args
model_folder = util.get_model_folder()
args_filename = util.get_args_path(model_folder)
util.save_object(args, args_filename)
# init models
util.set_seed(args.seed)
generative_model, inference_network, true_generative_model = \
util.init_models(args)
if args.train_mode == 'relax':
control_variate = models.ControlVariate(args.num_mixtures)
# init dataloader
obss_data_loader = torch.utils.data.DataLoader(
true_generative_model.sample_obs(args.num_obss),
batch_size=args.batch_size,
shuffle=True)
# train
if args.train_mode == 'mws':
train_callback = train.TrainMWSCallback(model_folder,
true_generative_model,
args.logging_interval,
args.checkpoint_interval,
args.eval_interval)
train.train_mws(generative_model, inference_network, obss_data_loader,
args.num_iterations, args.mws_memory_size,
train_callback)
if args.train_mode == 'ws':
train_callback = train.TrainWakeSleepCallback(
model_folder, true_generative_model,
args.batch_size * args.num_particles, args.logging_interval,
args.checkpoint_interval, args.eval_interval)
train.train_wake_sleep(generative_model, inference_network,
obss_data_loader, args.num_iterations,
args.num_particles, train_callback)
elif args.train_mode == 'ww':
train_callback = train.TrainWakeWakeCallback(model_folder,
true_generative_model,
args.num_particles,
args.logging_interval,
args.checkpoint_interval,
args.eval_interval)
train.train_wake_wake(generative_model, inference_network,
obss_data_loader, args.num_iterations,
args.num_particles, train_callback)
elif args.train_mode == 'dww':
train_callback = train.TrainDefensiveWakeWakeCallback(
model_folder, true_generative_model, args.num_particles, 0.2,
args.logging_interval, args.checkpoint_interval,
args.eval_interval)
train.train_defensive_wake_wake(0.2, generative_model,
inference_network, obss_data_loader,
args.num_iterations,
args.num_particles, train_callback)
elif args.train_mode == 'reinforce' or args.train_mode == 'vimco':
train_callback = train.TrainIwaeCallback(
model_folder, true_generative_model, args.num_particles,
args.train_mode, args.logging_interval, args.checkpoint_interval,
args.eval_interval)
train.train_iwae(args.train_mode, generative_model, inference_network,
obss_data_loader, args.num_iterations,
args.num_particles, train_callback)
elif args.train_mode == 'concrete':
train_callback = train.TrainConcreteCallback(
model_folder, true_generative_model, args.num_particles,
args.num_iterations, args.logging_interval,
args.checkpoint_interval, args.eval_interval)
train.train_iwae(args.train_mode, generative_model, inference_network,
obss_data_loader, args.num_iterations,
args.num_particles, train_callback)
elif args.train_mode == 'relax':
train_callback = train.TrainRelaxCallback(model_folder,
true_generative_model,
args.num_particles,
args.logging_interval,
args.checkpoint_interval,
args.eval_interval)
train.train_relax(generative_model, inference_network, control_variate,
obss_data_loader, args.num_iterations,
args.num_particles, train_callback)
# save models and stats
util.save_models(generative_model, inference_network, model_folder)
if args.train_mode == 'relax':
util.save_control_variate(control_variate, model_folder)
stats_filename = util.get_stats_path(model_folder)
util.save_object(train_callback, stats_filename)