cvae = CVAE(
input_size=INPUT_SIZE,
output_size=OUTPUT_SIZE,
latent_size=LATENT_SIZE,
encoder_layer_sizes=(200, 200),
decoder_layer_sizes=(200, 200),
dataset_name='mnist'
)
time_st = time.time()
for it in range(int(2e4)):
y, x = mnist.train.next_batch(BATCH_SIZE)
loss = cvae.update(x, y)
if it % int(1e3) == 0:
print('Iter-{}; Loss: {:.4f}, fps:{}'.format(it, loss.data, (it+1) // (time.time() - time_st)))
x = np.zeros(shape=[BATCH_SIZE, INPUT_SIZE], dtype=np.float32)
x[:, np.random.randint(0, 10)] = 1.
samples = cvae.sample(x).data.numpy()[:16]
fig = plt.figure(figsize=(4, 4))
gs = gridspec.GridSpec(4, 4)
gs.update(wspace=0.05, hspace=0.05)
for i, sample in enumerate(samples):
ax = plt.subplot(gs[i])
plt.axis('off')
ax.set_xticklabels([])
decoder_layer_sizes=(64, 64),
dataset_name='gmm',
alpha=ALPHA,
)
time_st = time.time()
os.makedirs('out/gmm', exist_ok=True)
save_dir = 'out/gmm/%d_%d_%d_%d_%.2f' % (INPUT_SIZE, OUTPUT_SIZE, LATENT_SIZE, N_INFERENCE, ALPHA)
os.makedirs(save_dir, exist_ok=True)
file = open(os.path.join(save_dir, 'progress.csv'), 'wt')
csv_writer = None
for it in range(int(2e4)):
inds = np.random.choice(nb_train, BATCH_SIZE, replace=False)
x, y, prob = xs_train[inds], ys_train[inds], probs_train[inds]
loss = cvae.update(x[:, None], y[:, None])
if it % int(1e3) == 0:
inds = np.random.choice(nb_train, BATCH_SIZE, replace=False)
x, y, prob = xs_train[inds], ys_train[inds], probs_train[inds]
prob_pred = []
for _ in range(N_INFERENCE):
mean, log_var = cvae.sample(x[:, None])
_log_prob = gaussian_log_density(mean, log_var, torch.tensor(y[:, None], dtype=torch.float32))
_prob = torch.exp(_log_prob).detach().numpy()
prob_pred.append(_prob)
prob_pred = np.mean(np.asarray(prob_pred), axis=0)
test_loss = np.mean((prob - prob_pred)**2)
print('Iter-{}; Train Loss: {:.4f}, Test Loss:{:.4f} fps:{}'.format(it, loss.data, test_loss,
(it+1) // (time.time() - time_st)))
print(np.round(prob[:3], 3), np.round(prob_pred[:3], 3))
