def main():
(X_train, y_train), (X_val, y_val), (X_test, y_test) = load_data()
print(X_train.shape, y_train.shape, X_val.shape, y_val.shape, X_test.shape,
y_test.shape)
if DO_TRAINING:
print('Building model...')
model = build_model(13, 20, 3)
# # define the loss function & optimizer that model should
# criterion = nn.CrossEntropyLoss()
# optimizer = torch.optim.SGD(model.parameters(), lr=LEARNING_RATE, nesterov=True,
# momentum=0.9, dampening=0, weight_decay=L2_REG)
# model.compile(loss=criterion, optimizer=optimizer, metrics=['acc'])
print(model.summary())
# train model
print('Training model...')
hist = model.fit(X_train,
y_train,
validation_data=(X_val, y_val),
epochs=NUM_EPOCHS,
batch_size=BATCH_SIZE)
kru.show_plots(hist.history,
metric='accuracy',
plot_title='Training metrics')
# evaluate model performance on train/eval & test datasets
print('\nEvaluating model performance...')
loss, acc = model.evaluate(X_train, y_train, verbose=0)
print(' Training dataset -> loss: %.4f - acc: %.4f' % (loss, acc))
loss, acc = model.evaluate(X_val, y_val, verbose=0)
print(' Cross-val dataset -> loss: %.4f - acc: %.4f' % (loss, acc))
oss, acc = model.evaluate(X_test, y_test, verbose=0)
print(' Test dataset -> loss: %.4f - acc: %.4f' % (loss, acc))
# save model state
kru.save_model(model, MODEL_SAVE_NAME)
del model
if DO_PREDICTION:
print('\nRunning predictions...')
# load model state from .pt file
model = kru.load_model(MODEL_SAVE_NAME)
print(model.summary())
print('\nEvaluating model performance...')
loss, acc = model.evaluate(X_train, y_train)
print(' Training dataset -> loss: %.4f - acc: %.4f' % (loss, acc))
loss, acc = model.evaluate(X_val, y_val)
print(' Cross-val dataset -> loss: %.4f - acc: %.4f' % (loss, acc))
oss, acc = model.evaluate(X_test, y_test)
print(' Test dataset -> loss: %.4f - acc: %.4f' % (loss, acc))
y_preds = np.argmax(model.predict(X_test), axis=1)
# display all predictions
print(f'Sample labels: {y_test}')
print(f'Sample predictions: {y_preds}')
print(f'We got {(y_preds == y_test).sum()}/{len(y_test)} correct!!')
def main():
(X_train, y_train), (X_val, y_val), (X_test, y_test) = load_data()
print(f"X_train.shape = {X_train.shape} - y_train.shape = {y_train.shape} " +
f"- X_val.shape = {X_val.shape} - y_val.shape = {y_val.shape} " +
f"- X_test.shape = {X_test.shape} - y_test.shape = {y_test.shape}")
if SHOW_SAMPLE:
print(f"Displaying sample of {SAMPLE_SIZE} images...")
rand_indexes = np.random.randint(0, len(X_test), SAMPLE_SIZE)
sample_images = X_test[rand_indexes]
sample_labels = y_test[rand_indexes]
display_sample(sample_images, sample_labels,
plot_title='Sample of %d images' % SAMPLE_SIZE)
if DO_TRAINING:
model = build_model(l2_loss_lambda=L2_REG)
print(model.summary())
lr_scheduler = LearningRateScheduler(step_lr)
hist = model.fit(X_train, y_train, epochs=NUM_EPOCHS, batch_size=BATCH_SIZE,
validation_data=(X_val, y_val), callbacks=[lr_scheduler])
kru.show_plots(hist.history, metric='sparse_categorical_accuracy')
# evaluate model performance
print('\nEvaluating model performance...')
loss, acc = model.evaluate(X_train, y_train)
print(f' Training dataset -> loss: {loss:.4f} - acc: {acc:.4f}')
loss, acc = model.evaluate(X_val, y_val)
print(f' Cross-val dataset -> loss: {loss:.4f} - acc: {acc:.4f}')
loss, acc = model.evaluate(X_test, y_test)
print(f' Test dataset -> loss: {loss:.4f} - acc: {acc:.4f}')
kru.save_model(model, MODEL_SAVE_PATH)
del model
if DO_PREDICTION:
model = kru.load_model(MODEL_SAVE_PATH)
print(model.summary())
y_pred = model.predict(X_test)
y_pred = np.argmax(y_pred, axis=1)
print('Sample labels (50): ', y_test[:50])
print('Sample predictions (50): ', y_pred[:50])
print('We got %d/%d incorrect!' %
((y_pred != y_test).sum(), len(y_test)))
if SHOW_SAMPLE:
# display sample predictions
rand_indexes = np.random.randint(0, len(X_test), SAMPLE_SIZE)
sample_images = X_test[rand_indexes]
sample_labels = y_test[rand_indexes]
sample_predictions = y_pred[rand_indexes]
model_type = 'CNN' if USE_CNN else 'ANN'
display_sample(sample_images, sample_labels, sample_predictions,
num_rows=5, num_cols=10, plot_title=f'Keras {model_type} - {SAMPLE_SIZE} random predictions')
del model
def main():
(X_train, y_train), (X_val, y_val), (X_test, y_test) = load_data()
print(
f"X_train.shape = {X_train.shape} - y_train.shape = {y_train.shape} " +
f"- X_val.shape = {X_val.shape} - y_val.shape = {y_val.shape} " +
f"- X_test.shape = {X_test.shape} - y_test.shape = {y_test.shape}")
y_train, y_val, y_test = y_train.astype(np.float), y_val.astype(
np.float), y_test.astype(np.float)
if DO_TRAINING:
model = build_model(NUM_FEATURES, 32, 32, NUM_CLASSES, L2_REG)
print(model.summary())
print('Training model...')
hist = model.fit(X_train,
y_train,
validation_split=0.20,
epochs=NUM_EPOCHS,
batch_size=BATCH_SIZE)
kru.show_plots(hist.history, metric='acc')
# evaluate model performance
print('\nEvaluating model performance...')
loss, acc = model.evaluate(X_train, y_train)
print(f' Training dataset -> loss: {loss:.4f} - acc: {acc:.4f}')
loss, acc = model.evaluate(X_val, y_val)
print(f' Cross-val dataset -> loss: {loss:.4f} - acc: {acc:.4f}')
loss, acc = model.evaluate(X_test, y_test)
print(f' Test dataset -> loss: {loss:.4f} - acc: {acc:.4f}')
kru.save_model(model, MODEL_SAVE_NAME)
del model
if DO_PREDICTION:
print('\nRunning predictions...')
model = kru.load_model(MODEL_SAVE_NAME)
print(model.summary())
y_pred = np.argmax(np.round(model.predict(X_test)), axis=1)
y_true = np.argmax(y_test, axis=1)
# display output
print('Sample labels: ', y_true)
print('Sample predictions: ', y_pred)
print('We got %d/%d correct!' %
((y_true == y_pred).sum(), len(y_true)))
def main():
# generate data with noise
M, C = 1.8, 32.0
X, y = generate_temp_data(M, C, numelems=500, std=25)
print(f"X.shape = {X.shape}, y.shape = {y.shape}")
# display plot of generated data
plt.figure(figsize=(8, 6))
plt.scatter(X, y, s=40, c='steelblue')
plt.title(f'Original Data -> $y = {M:.2f} * X + {C:.2f}$')
plt.show()
model = build_model()
print(model.summary())
print('Before training: ')
print(f' Weight: {model.layers[0].get_weights()[0]} ' +
f'Bias: {model.layers[0].get_weights()[1]}')
# train the model
print('Training....', flush=True)
hist = model.fit(X, y, epochs=5000, batch_size=32, verbose=2)
kru.show_plots(hist.history,
metric='r2_score',
plot_title="Performance Metrics")
print('After training: ')
print(f' Weight: {model.layers[0].get_weights()[0]} ' +
f'bias: {model.layers[0].get_weights()[1]}')
# display plot of prediction with gerated data
plt.figure(figsize=(8, 6))
y_pred = model.predict(X)
plt.scatter(X, y, s=40, c='steelblue')
plt.plot(X, y_pred, lw=2, c='firebrick')
Mp, Cp = model.layers[0].get_weights()[0][0], \
model.layers[0].get_weights()[1][0]
plt.title(f'Prediction -> $y = {Mp:.2f} * X + {Cp:.2f}$')
plt.show()
X_test = X_test / 255.0
model = tf.keras.models.Sequential([
tf.keras.layers.Flatten(input_shape=(28, 28)),
tf.keras.layers.Dense(128, activation=tf.nn.relu),
tf.keras.layers.Dense(64, activation=tf.nn.relu),
tf.keras.layers.Dense(10, activation=tf.nn.softmax)
])
model.compile(loss='sparse_categorical_crossentropy',
optimizer='adam',
metrics=['accuracy'])
print(model.summary())
hist = model.fit(X_train,
y_train,
validation_split=0.2,
epochs=25,
batch_size=32)
kru.show_plots(hist.history, metric='accuracy')
# evaluate performance
loss, acc = model.evaluate(X_train, y_train)
print(f"Training data -> loss: {loss:.3f} - acc: {acc:.3f}")
loss, acc = model.evaluate(X_test, y_test)
print(f"Testing data -> loss: {loss:.3f} - acc: {acc:.3f}")
# save model
kru.save_model(model, 'kr_fashion2')
del model
class_weight=class_weight,
batch_size=256,
validation_data=(X_test, y_test),
callbacks=[
EarlyStopping(monitor="val_f1",
mode='max',
patience=5,
restore_best_weights=True)
])
results = model.evaluate(X_test, y_test)
print(results)
import kr_helper_funcs as kr
from sklearn.metrics import classification_report, confusion_matrix
kr.show_plots(history.history)
predictions = model.predict_classes(X_test)
print(classification_report(y_test, predictions))
kr.plot_cm(y_test, predictions, ["unpaid", "paid"])
plt.show()
# from threading import Lock
# lock = Lock()
import os
def save_model(name='without_postcode', model=model):
# lock.aquire()
# try:
plt.show()
from tensorflow.keras.callbacks import EarlyStopping
early_stop = EarlyStopping(monitor='val_loss', patience=5)
model.fit(x=X_train_rus,
y=y_train_rus,
epochs=25,
class_weight=class_weight,
batch_size=256,
validation_data=(X_test, y_test),
callbacks=[early_stop])
import kr_helper_funcs as kr
from sklearn.metrics import classification_report, confusion_matrix
kr.show_plots(model.history.history)
predictions = model.predict_classes(X_test)
print(classification_report(y_test, predictions))
kr.plot_cm(y_test, predictions, ["unpaid", "paid"])
plt.show()
from tensorflow.keras.models import load_model
# model = tf.keras.models.load_model('lending-club.h5')
import os
name = 'without_postcode'
if not os.path.exists(name):
os.mkdir(name)
tf.keras.models.save_model(model, '{}/lending-club.h5'.format(name))
pd.DataFrame.from_dict(model.history.history).to_csv(
name + "/" + 'lending-club-history.csv'.format(name), index=False)
def show_plots(history):
kru.show_plots(history)