Window - 2019 December 29¶
[1]:
import numpy as np
from matplotlib import pyplot as plt
import torch
import torch.nn as nn
import torch.optim as optim
from torch.utils.data import DataLoader, random_split
from tqdm import tqdm
import seaborn as sns
from src.dataset import OzeDataset
from src.Transformer import Transformer
from src.loss import OZELoss
from src.utils import visual_sample, compute_loss
[2]:
# Training parameters
DATASET_PATH = 'datasets/dataset_CAPTrocadero.npz'
BATCH_SIZE = 4
NUM_WORKERS = 4
LR = 1.5e-4
EPOCHS = 20
# Model parameters
K = 672 # Time window length
d_model = 48 # Lattent dim
q = 8 # Query size
v = 8 # Value size
h = 4 # Number of heads
N = 4 # Number of encoder and decoder to stack
pe = None # Positional encoding
chunk_mode = 'window'
d_input = 37 # From dataset
d_output = 8 # From dataset
# Config
sns.set()
device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
print(f"Using device {device}")
Using device cuda:0
Training¶
Load dataset¶
[3]:
ozeDataset = OzeDataset(DATASET_PATH)
dataset_train, dataset_val, dataset_test = random_split(ozeDataset, (9000, 500, 500))
dataloader_train = DataLoader(dataset_train,
batch_size=BATCH_SIZE,
shuffle=True,
num_workers=NUM_WORKERS,
pin_memory=False
)
dataloader_val = DataLoader(dataset_val,
batch_size=BATCH_SIZE,
shuffle=True,
num_workers=NUM_WORKERS
)
dataloader_test = DataLoader(dataset_test,
batch_size=BATCH_SIZE,
shuffle=False,
num_workers=NUM_WORKERS
)
Load network¶
[4]:
# Load transformer with Adam optimizer and MSE loss function
net = Transformer(d_input, d_model, d_output, q, v, h, K, N, chunk_mode=chunk_mode, pe=pe).to(device)
optimizer = optim.Adam(net.parameters(), lr=LR)
loss_function = OZELoss(alpha=0.3)
Train¶
[5]:
# Prepare loss history
hist_loss = np.zeros(EPOCHS)
hist_loss_val = np.zeros(EPOCHS)
for idx_epoch in range(EPOCHS):
running_loss = 0
with tqdm(total=len(dataloader_train.dataset), desc=f"[Epoch {idx_epoch+1:3d}/{EPOCHS}]") as pbar:
for idx_batch, (x, y) in enumerate(dataloader_train):
optimizer.zero_grad()
# Propagate input
netout = net(x.to(device))
# Comupte loss
loss = loss_function(y.to(device), netout)
# Backpropage loss
loss.backward()
# Update weights
optimizer.step()
running_loss += loss.item()
pbar.set_postfix({'loss': running_loss/(idx_batch+1)})
pbar.update(x.shape[0])
train_loss = running_loss/len(dataloader_train)
val_loss = compute_loss(net, dataloader_val, loss_function, device).item()
pbar.set_postfix({'loss': train_loss, 'val_loss': val_loss})
hist_loss[idx_epoch] = train_loss
hist_loss_val[idx_epoch] = val_loss
plt.plot(hist_loss, 'o-', label='train')
plt.plot(hist_loss_val, 'o-', label='val')
plt.legend()
print(f"Loss: {float(hist_loss[-1]):5f}")
model_path = f"models/model_{str(hist_loss[-1]).split('.')[-1][:5]}.pth"
torch.save(net, model_path)
print(f"model exported to {model_path}")
[Epoch 1/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.82it/s, loss=0.0139, val_loss=0.00843]
[Epoch 2/20]: 100%|██████████| 9000/9000 [04:51<00:00, 30.83it/s, loss=0.00662, val_loss=0.00666]
[Epoch 3/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.81it/s, loss=0.00546, val_loss=0.00491]
[Epoch 4/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.81it/s, loss=0.00466, val_loss=0.00417]
[Epoch 5/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.79it/s, loss=0.004, val_loss=0.00384]
[Epoch 6/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.82it/s, loss=0.00327, val_loss=0.00319]
[Epoch 7/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.78it/s, loss=0.00279, val_loss=0.00291]
[Epoch 8/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.79it/s, loss=0.00241, val_loss=0.00226]
[Epoch 9/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.82it/s, loss=0.00217, val_loss=0.00201]
[Epoch 10/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.79it/s, loss=0.00201, val_loss=0.00207]
[Epoch 11/20]: 100%|██████████| 9000/9000 [04:53<00:00, 30.62it/s, loss=0.00185, val_loss=0.0021]
[Epoch 12/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.82it/s, loss=0.00176, val_loss=0.00162]
[Epoch 13/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.79it/s, loss=0.00166, val_loss=0.00161]
[Epoch 14/20]: 100%|██████████| 9000/9000 [04:51<00:00, 30.83it/s, loss=0.00157, val_loss=0.00163]
[Epoch 15/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.82it/s, loss=0.0015, val_loss=0.00149]
[Epoch 16/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.81it/s, loss=0.00145, val_loss=0.00139]
[Epoch 17/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.80it/s, loss=0.00139, val_loss=0.00135]
[Epoch 18/20]: 100%|██████████| 9000/9000 [04:51<00:00, 30.83it/s, loss=0.00133, val_loss=0.00127]
[Epoch 19/20]: 100%|██████████| 9000/9000 [04:51<00:00, 30.83it/s, loss=0.00129, val_loss=0.00135]
[Epoch 20/20]: 100%|██████████| 9000/9000 [04:52<00:00, 30.81it/s, loss=0.00122, val_loss=0.00124]
Loss: 0.001224
model exported to models/model_00122.pth
Validation¶
[7]:
_ = net.eval()
Plot results on a sample¶
[8]:
visual_sample(dataloader_test, net, device)
plt.savefig("fig.jpg")
Plot encoding attention map¶
[9]:
# Select first encoding layer
encoder = net.layers_encoding[0]
# Get the first attention map
attn_map = encoder.attention_map[0].cpu()
# Plot
plt.figure(figsize=(20, 20))
sns.heatmap(attn_map)
plt.savefig("attention_map.jpg")
Evaluate on the test dataset¶
[10]:
predictions = np.empty(shape=(len(dataloader_test.dataset), K, 8))
idx_prediction = 0
with torch.no_grad():
for x, y in tqdm(dataloader_test, total=len(dataloader_test)):
netout = net(x.to(device)).cpu().numpy()
predictions[idx_prediction:idx_prediction+x.shape[0]] = netout
idx_prediction += x.shape[0]
100%|██████████| 125/125 [00:06<00:00, 20.21it/s]
[11]:
fig, axes = plt.subplots(8, 1)
fig.set_figwidth(20)
fig.set_figheight(40)
plt.subplots_adjust(bottom=0.05)
occupancy = (dataloader_test.dataset.dataset._x.numpy()[..., dataloader_test.dataset.dataset.labels["Z"].index("occupancy")].mean(axis=0)>0.5).astype(float)
y_true_full = dataloader_test.dataset.dataset._y[dataloader_test.dataset.indices].numpy()
for idx_label, (label, ax) in enumerate(zip(dataloader_test.dataset.dataset.labels['X'], axes)):
# Select output to plot
y_true = y_true_full[..., idx_label]
y_pred = predictions[..., idx_label]
# Rescale
y_true = dataloader_test.dataset.dataset.rescale(y_true, idx_label)
y_pred = dataloader_test.dataset.dataset.rescale(y_pred, idx_label)
# Compute delta, mean and std
delta = np.abs(y_true - y_pred)
mean = delta.mean(axis=0)
std = delta.std(axis=0)
# Plot
# Labels for consumption and temperature
if label.startswith('Q_'):
y_label_unit = 'kW'
else:
y_label_unit = '°C'
# Occupancy
occupancy_idxes = np.where(np.diff(occupancy) != 0)[0]
for idx in range(0, len(occupancy_idxes), 2):
ax.axvspan(occupancy_idxes[idx], occupancy_idxes[idx+1], facecolor='green', alpha=.15)
# Std
ax.fill_between(np.arange(mean.shape[0]), (mean - std), (mean + std), alpha=.4, label='std')
# Mean
ax.plot(mean, label='mean')
# Title and labels
ax.set_title(label)
ax.set_xlabel('time', fontsize=16)
ax.set_ylabel(y_label_unit, fontsize=16)
ax.legend()
plt.savefig('error_mean_std.jpg')
