def testIrisES(self):
random.seed(42)
iris = datasets.load_iris()
x_train, x_test, y_train, y_test = train_test_split(iris.data,
iris.target,
test_size=0.2,
random_state=42)
x_train, x_val, y_train, y_val = train_test_split(x_train,
y_train,
test_size=0.2,
random_state=42)
val_monitor = learn.monitors.ValidationMonitor(
x_val,
y_val,
every_n_steps=50,
early_stopping_rounds=100,
early_stopping_metric='accuracy',
early_stopping_metric_minimize=False)
# classifier without early stopping - overfitting
classifier1 = learn.TensorFlowDNNClassifier(hidden_units=[10, 20, 10],
n_classes=3,
steps=1000)
classifier1.fit(x_train, y_train)
_ = accuracy_score(y_test, classifier1.predict(x_test))
# Full 1000 steps, 11 summaries and no evaluation summary.
# 11 summaries = first + every 100 out of 1000 steps.
self.assertEqual(11, len(_get_summary_events(classifier1.model_dir)))
with self.assertRaises(ValueError):
_get_summary_events(classifier1.model_dir + '/eval')
# classifier with early stopping - improved accuracy on testing set
classifier2 = learn.TensorFlowDNNClassifier(
hidden_units=[10, 20, 10],
n_classes=3,
steps=2000,
config=tf.contrib.learn.RunConfig(save_checkpoints_secs=1))
classifier2.fit(x_train, y_train, monitors=[val_monitor])
_ = accuracy_score(y_val, classifier2.predict(x_val))
_ = accuracy_score(y_test, classifier2.predict(x_test))
# Note, this test is unstable, so not checking for equality.
# See stability_test for examples of stability issues.
if val_monitor.early_stopped:
self.assertLess(val_monitor.best_step, 2000)
# Note, due to validation monitor stopping after the best score occur,
# the accuracy at current checkpoint is less.
# TODO(ipolosukhin): Time machine for restoring old checkpoints?
# flaky, still not always best_value better then score2 value.
# self.assertGreater(val_monitor.best_value, score2_val)
# Early stopped, unstable so checking only < then max.
self.assertLess(len(_get_summary_events(classifier2.model_dir)),
21)
self.assertLess(
len(_get_summary_events(classifier2.model_dir + '/eval')), 4)
def testIrisES(self):
random.seed(42)
iris = datasets.load_iris()
x_train, x_test, y_train, y_test = train_test_split(iris.data,
iris.target,
test_size=0.2,
random_state=42)
x_train, x_val, y_train, y_val = train_test_split(
x_train, y_train, test_size=0.2)
val_monitor = learn.monitors.ValidationMonitor(x_val, y_val,
early_stopping_rounds=100)
# classifier without early stopping - overfitting
classifier1 = learn.TensorFlowDNNClassifier(hidden_units=[10, 20, 10],
n_classes=3,
steps=1000)
classifier1.fit(x_train, y_train)
accuracy_score(y_test, classifier1.predict(x_test))
# classifier with early stopping - improved accuracy on testing set
classifier2 = learn.TensorFlowDNNClassifier(hidden_units=[10, 20, 10],
n_classes=3,
steps=1000)
classifier2.fit(x_train, y_train, monitors=[val_monitor])
accuracy_score(y_test, classifier2.predict(x_test))
def testIrisES(self):
random.seed(42)
iris = datasets.load_iris()
x_train, x_test, y_train, y_test = train_test_split(iris.data, iris.target, test_size=0.2, random_state=42)
x_train, x_val, y_train, y_val = train_test_split(x_train, y_train, test_size=0.2, random_state=42)
val_monitor = learn.monitors.ValidationMonitor(
x_val,
y_val,
every_n_steps=50,
early_stopping_rounds=100,
early_stopping_metric="accuracy",
early_stopping_metric_minimize=False,
)
# classifier without early stopping - overfitting
classifier1 = learn.TensorFlowDNNClassifier(hidden_units=[10, 20, 10], n_classes=3, steps=1000)
classifier1.fit(x_train, y_train)
_ = accuracy_score(y_test, classifier1.predict(x_test))
# Full 1000 steps, 12 summaries and no evaluation summary.
# 12 summaries = global_step + first + every 100 out of 1000 steps.
self.assertEqual(12, len(_get_summary_events(classifier1.model_dir)))
with self.assertRaises(ValueError):
_get_summary_events(classifier1.model_dir + "/eval")
# classifier with early stopping - improved accuracy on testing set
classifier2 = learn.TensorFlowDNNClassifier(
hidden_units=[10, 20, 10],
n_classes=3,
steps=2000,
config=tf.contrib.learn.RunConfig(save_checkpoints_secs=1),
)
classifier2.fit(x_train, y_train, monitors=[val_monitor])
_ = accuracy_score(y_val, classifier2.predict(x_val))
_ = accuracy_score(y_test, classifier2.predict(x_test))
# Note, this test is unstable, so not checking for equality.
# See stability_test for examples of stability issues.
if val_monitor.early_stopped:
self.assertLess(val_monitor.best_step, 2000)
# Note, due to validation monitor stopping after the best score occur,
# the accuracy at current checkpoint is less.
# TODO(ipolosukhin): Time machine for restoring old checkpoints?
# flaky, still not always best_value better then score2 value.
# self.assertGreater(val_monitor.best_value, score2_val)
# Early stopped, unstable so checking only < then max.
self.assertLess(len(_get_summary_events(classifier2.model_dir)), 21)
# Eval typically has ~6 events, but it varies based on the run.
self.assertLess(len(_get_summary_events(classifier2.model_dir + "/eval")), 8)
def testIrisMomentum(self):
random.seed(42)
iris = datasets.load_iris()
x_train, x_test, y_train, y_test = train_test_split(iris.data,
iris.target,
test_size=0.2,
random_state=42)
def custom_optimizer(learning_rate):
return tf.train.MomentumOptimizer(learning_rate, 0.9)
cont_features = [
tf.contrib.layers.real_valued_column("", dimension=4)]
classifier = learn.TensorFlowDNNClassifier(
feature_columns=cont_features,
hidden_units=[10, 20, 10],
n_classes=3,
steps=400,
learning_rate=0.01,
optimizer=custom_optimizer)
classifier.fit(x_train, y_train)
score = accuracy_score(y_test, classifier.predict(x_test))
self.assertGreater(score, 0.65, "Failed with score = {0}".format(score))
def get_datasets(csv_path, test_size=0.1, image_size=28, color=True):
""" トレーニングとテスト用のデータセットを取得
@param
csv_path データセットcsv
test_size データセットをテストに利用する割合
image_size 画像の1辺のpixel数
color カラー画像フラグ
@return
x_train トレーニングデータセット(特徴)
x_test テストデータセット(特徴)
y_train トレーニングデータセット(答えラベル)
y_test テストデータセット(答えラベル)
"""
csv_reader = csv.reader(io.open(csv_path, 'r', encoding='utf-8'),
delimiter=',')
labels = get_labels(csv_path)
X = []
y = []
for row in csv_reader:
# ベクトル化した画像
X.append(image_to_vector(row[0], image_size=image_size, color=color))
# one of k方式で答えラベルを用意
one_of_k = np.zeros(len(labels))
one_of_k.put(labels.index(row[1]), 1)
y.append(one_of_k)
return train_test_split(np.array(X),
np.array(y),
test_size=test_size,
random_state=42)
def testIrisMomentum(self):
random.seed(42)
iris = datasets.load_iris()
x_train, x_test, y_train, y_test = train_test_split(iris.data,
iris.target,
test_size=0.2,
random_state=42)
def custom_optimizer(learning_rate):
return tf.train.MomentumOptimizer(learning_rate, 0.9)
classifier = learn.TensorFlowDNNClassifier(
hidden_units=[10, 20, 10],
feature_columns=learn.infer_real_valued_columns_from_input(
x_train),
n_classes=3,
steps=400,
learning_rate=0.01,
optimizer=custom_optimizer)
classifier.fit(x_train, y_train)
score = accuracy_score(y_test, classifier.predict(x_test))
self.assertGreater(score, 0.65,
"Failed with score = {0}".format(score))
def testIrisMomentum(self):
random.seed(42)
iris = datasets.load_iris()
x_train, x_test, y_train, y_test = train_test_split(iris.data,
iris.target,
test_size=0.2,
random_state=42)
# setup exponential decay function
def exp_decay(global_step):
return tf.train.exponential_decay(learning_rate=0.1,
global_step=global_step,
decay_steps=100,
decay_rate=0.001)
def custom_optimizer(learning_rate):
return tf.train.MomentumOptimizer(learning_rate, 0.9)
classifier = learn.TensorFlowDNNClassifier(hidden_units=[10, 20, 10],
n_classes=3,
steps=400,
learning_rate=exp_decay,
optimizer=custom_optimizer)
classifier.fit(x_train, y_train)
score = accuracy_score(y_test, classifier.predict(x_test))
self.assertGreater(score, 0.65, "Failed with score = {0}".format(score))
def testIrisMomentum(self):
random.seed(42)
iris = datasets.load_iris()
x_train, x_test, y_train, y_test = train_test_split(iris.data,
iris.target,
test_size=0.2,
random_state=42)
def custom_optimizer():
return momentum_lib.MomentumOptimizer(learning_rate=0.01,
momentum=0.9)
classifier = learn.DNNClassifier(
hidden_units=[10, 20, 10],
feature_columns=learn.infer_real_valued_columns_from_input(
x_train),
n_classes=3,
optimizer=custom_optimizer,
config=learn.RunConfig(tf_random_seed=1))
classifier.fit(x_train, y_train, steps=400)
predictions = np.array(list(classifier.predict_classes(x_test)))
score = accuracy_score(y_test, predictions)
self.assertGreater(score, 0.65,
"Failed with score = {0}".format(score))
def testIrisMomentum(self):
random.seed(42)
iris = datasets.load_iris()
X_train, X_test, y_train, y_test = train_test_split(iris.data,
iris.target,
test_size=0.2,
random_state=42)
# setup exponential decay function
def exp_decay(global_step):
return tf.train.exponential_decay(learning_rate=0.1,
global_step=global_step,
decay_steps=100,
decay_rate=0.001)
custom_optimizer = lambda learning_rate: tf.train.MomentumOptimizer(
learning_rate, 0.9)
classifier = learn.TensorFlowDNNClassifier(hidden_units=[10, 20, 10],
n_classes=3,
steps=800,
learning_rate=exp_decay,
optimizer=custom_optimizer)
classifier.fit(X_train, y_train)
score = accuracy_score(y_test, classifier.predict(X_test))
self.assertGreater(score, 0.7, "Failed with score = {0}".format(score))
def train(tokenizer, model_dir):
word_index, embeddings_matrix = generate_embeddings(tokenizer)
x_train, x_validate, y_train, y_validate = train_test_split(
data['content'], data['label'], test_size=0.1)
list_tokenized_train = tokenizer.texts_to_sequences(x_train)
input_train = sequence.pad_sequences(list_tokenized_train, maxlen=maxlen)
list_tokenized_validation = tokenizer.texts_to_sequences(x_validate)
input_validation = sequence.pad_sequences(list_tokenized_validation,
maxlen=maxlen)
y_train = keras.utils.to_categorical(y_train, num_classes=3)
y_validate = keras.utils.to_categorical(y_validate, num_classes=3)
model1 = CNN().model(embeddings_matrix, maxlen, word_index)
file_path = model_dir + model_name % "{epoch:02d}"
checkpoint = ModelCheckpoint(file_path, verbose=2, save_weights_only=True)
metrics = Metrics()
callbacks_list = [checkpoint, metrics]
model1.fit(input_train,
y_train,
batch_size=batch_size,
epochs=epochs,
validation_data=(input_validation, y_validate),
callbacks=callbacks_list,
verbose=2)
del model1
def dividirDataset(dataset):
X = dataset[:, 0:21]
Y = dataset[:, 21]
X_train, X_test, Y_train, Y_test = train_test_split(X,
Y,
test_size=0.35,
random_state=0)
print(X_train.shape)
print(X_test.shape)
print(Y_train.shape)
print(Y_test.shape)
return (X_train, X_test, Y_train, Y_test)
def split_data(self, x, y):
x_train, x_validate, y_train, y_validate = train_test_split(
x, y, test_size=0.1)
tokenizer = Tokenizer(num_words=self.max_words)
tokenizer.fit_on_texts(x_train)
train_seq = tokenizer.texts_to_sequences(x_train)
x_train = sequence.pad_sequences(train_seq, maxlen=self.max_len)
tokenizer.fit_on_texts(x_validate)
val_seq = tokenizer.texts_to_sequences(x_validate)
x_validate = sequence.pad_sequences(val_seq, self.max_len)
y_train = keras.utils.to_categorical(x_validate, num_classes=3)
y_validate = keras.utils.to_categorical(y_validate, num_classes=3)
return x_train, y_train, x_validate, y_validate
def train_model(training_data):
X = np.array([i[0]
for i in training_data]).reshape(-1,
len(training_data[0][0]))
y = np.array([i[1]
for i in training_data]).reshape(-1,
len(training_data[0][1]))
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2)
print("Shapes: X_train {}, X_test {}".format(X_train.shape, X_test.shape))
model = build_model(input_size=len(X[0]), output_size=len(y[0]))
history = model.fit(X_train,
y_train,
batch_size=512,
epochs=200,
verbose=0,
validation_data=(X_test, y_test),
shuffle=True)
return model, history
def testIrisMomentum(self):
random.seed(42)
iris = datasets.load_iris()
x_train, x_test, y_train, y_test = train_test_split(iris.data, iris.target, test_size=0.2, random_state=42)
def custom_optimizer():
return tf.train.MomentumOptimizer(learning_rate=0.01, momentum=0.9)
classifier = learn.DNNClassifier(
hidden_units=[10, 20, 10],
feature_columns=learn.infer_real_valued_columns_from_input(x_train),
n_classes=3,
optimizer=custom_optimizer,
config=learn.RunConfig(tf_random_seed=1),
)
classifier.fit(x_train, y_train, steps=400)
score = accuracy_score(y_test, classifier.predict(x_test))
self.assertGreater(score, 0.65, "Failed with score = {0}".format(score))
def __init__(self, load=False):
self.model = Sequential([
Embedding(1000, 32),
LSTM(128, dropout=0.2, recurrent_dropout=0.2),
Dense(128, activation='relu'),
Dense(1, activation='sigmoid'),
])
if load:
self.model.load_weights('sms_model')
else:
self.model.compile(metrics=['acc'],
optimizer='adam',
loss='binary_crossentropy')
df = pd.read_csv('14 spam data.csv',
delimiter=',',
encoding='latin-1')[['v1', 'v2']]
Y = (df.v1 == 'ham').astype('int').values
X = df.v2
max_words = 1000
max_len = 150
tok = Tokenizer(num_words=max_words)
tok.fit_on_texts(X)
sequences = tok.texts_to_sequences(X)
X = sequence.pad_sequences(sequences, maxlen=max_len)
X_train, X_test, y_train, y_test = train_test_split(
X, Y, test_size=0.1, random_state=42)
for i in range(5):
self.model.fit(X_train,
y_train,
epochs=1,
batch_size=32,
verbose=1)
self.model.save_weights('sms_model')
print(self.model.evaluate(X_test, y_test))
def testIrisMomentum(self):
random.seed(42)
iris = datasets.load_iris()
x_train, x_test, y_train, y_test = train_test_split(iris.data,
iris.target,
test_size=0.2,
random_state=42)
def custom_optimizer():
return tf.train.MomentumOptimizer(learning_rate=0.01, momentum=0.9)
cont_features = [tf.contrib.layers.real_valued_column("", dimension=4)]
classifier = learn.DNNClassifier(
feature_columns=cont_features,
hidden_units=[10, 20, 10],
n_classes=3,
optimizer=custom_optimizer,
config=learn.RunConfig(tf_random_seed=1))
classifier.fit(x_train, y_train, steps=400)
score = accuracy_score(y_test, classifier.predict(x_test))
self.assertGreater(score, 0.65,
"Failed with score = {0}".format(score))
def train_model(X_data, y_data):
# https://keras.io/examples/generative/lstm_character_level_text_generation/
# 清洗数据集，生成所需要的数据
print('-' * 5 + ' ' * 3 + "清洗数据集" + ' ' * 3 + '-' * 5)
X_doc, y_doc = generate_data(X_data, y_data)
output_example_data(X_doc, y_doc)
# ----------------------------------------------------------------------
print('-' * 5 + ' ' * 3 + "填充数据集" + ' ' * 3 + '-' * 5)
X_seq = pad_sequences(X_doc, maxlen = max_len, padding = 'post')
y_seq = y_doc
# ----------------------------------------------------------------------
print('-' * 5 + ' ' * 3 + "拆分数据集" + ' ' * 3 + '-' * 5)
X_train, X_test, y_train, y_test = train_test_split(X_seq, y_seq, random_state = seed, stratify = y_seq)
print("训练数据集（train_data）：%d 条数据；测试数据集（test_data）：%d 条数据" % ((len(y_train)), (len(y_test))))
# ----------------------------------------------------------------------
# 构建模型
print('-' * 5 + ' ' * 3 + "构建网络模型" + ' ' * 3 + '-' * 5)
model = construct_model()
print(model.summary())
# ----------------------------------------------------------------------
# 输出训练的结果
def output_result():
print("模型预测-->", end = '')
print("损失值 = {}，精确度 = {}".format(results[0], results[1]))
if label_name == 'age':
np_argmax = np.argmax(predictions, 1)
# print("前 30 个真实的预测数据 =", np.array(X_test[:30], dtype = int))
print("前 30 个真实的目标数据 =", np.array(y_test[:30], dtype = int))
print("前 30 个预测的目标数据 =", np.array(np.argmax(predictions[:30], 1), dtype = int))
print("前 30 个预测的结果数据 =", )
print(predictions[:30])
for i in range(10):
print("类别 {0} 的真实数目：{1}，预测数目：{2}".format(i, sum(y_test == i), sum(np_argmax == i)))
elif label_name == 'gender':
predict_gender = np.array(predictions > 0.5, dtype = int)
print("sum(abs(predictions>0.5-y_test_scaled))/sum(y_test_scaled) = error% =",
sum(abs(predict_gender - y_test)) / sum(y_test) * 100, '%')
print("前100个真实的目标数据 =", np.array(y_test[:100], dtype = int))
print("前100个预测的目标数据 =", np.array(predict_gender[:100], dtype = int))
print("sum(predictions>0.5) =", sum(predict_gender))
print("sum(y_test) =", sum(y_test))
print("sum(abs(predictions-y_test))=error_number=", sum(abs(predict_gender - y_test)))
else:
print("错误的标签名称：", label_name)
pass
pass
# ----------------------------------------------------------------------
# 训练网络模型
# 使用验证集
print('-' * 5 + ' ' * 3 + "使用验证集训练网络模型" + ' ' * 3 + '-' * 5)
model.fit(X_train, y_train, epochs = epochs, batch_size = batch_size,
validation_split = 0.2, use_multiprocessing = True, verbose = 2)
results = model.evaluate(X_test, y_test, verbose = 0)
predictions = model.predict(X_test).squeeze()
output_result()
# ----------------------------------------------------------------------
# 不使用验证集，训练次数减半
print('-' * 5 + ' ' * 3 + "不使用验证集训练网络模型，训练次数减半" + ' ' * 3 + '-' * 5)
model.fit(X_train, y_train, epochs = epochs // 2, batch_size = batch_size,
use_multiprocessing = True, verbose = 2)
results = model.evaluate(X_test, y_test, verbose = 0)
predictions = model.predict(X_test).squeeze()
output_result()
pass
def main(_):
if not FLAGS.data_path:
raise ValueError("Must set --data_path to PTB data directory")
gpus = [
x.name for x in device_lib.list_local_devices()
if x.device_type == "GPU"
]
if FLAGS.num_gpus > len(gpus):
raise ValueError("Your machine has only %d gpus "
"which is less than the requested --num_gpus=%d." %
(len(gpus), FLAGS.num_gpus))
i = 0
data = []
L = file_name(FLAGS.data_path)
for dir in L:
if i == 0:
data = np.loadtxt(dir)
else:
tmp = np.loadtxt(dir)
data = np.vstack((data, tmp))
i += 1
random.shuffle(data)
train_x, test_x, train_y, test_y = train_test_split(data[:, :-1],
data[:, -1],
test_size=0.2,
random_state=0)
train_x, valid_x, train_y, valid_y = train_test_split(train_x[:, :],
train_y[:],
test_size=0.2,
random_state=42)
config = get_config()
eval_config = get_config()
eval_config.batch_size = 1
# with tf.Graph().as_default():
initializer = tf.random_uniform_initializer(-config.init_scale,
config.init_scale)
with tf.name_scope("Train"):
train_input = PTBInput(config=config,
x_data=train_x,
y_data=train_y,
name="TrainInput")
with tf.variable_scope("Model", reuse=None, initializer=initializer):
m = PTBModel(is_training=True, config=config, input_=train_input)
tf.summary.scalar("Training Loss", m.cost)
tf.summary.scalar("Learning Rate", m.lr)
with tf.name_scope("Valid"):
valid_input = PTBInput(config=config,
x_data=valid_x,
y_data=valid_y,
name="ValidInput")
with tf.variable_scope("Model", reuse=True, initializer=initializer):
mvalid = PTBModel(is_training=False,
config=config,
input_=valid_input)
tf.summary.scalar("Validation Loss", mvalid.cost)
with tf.name_scope("Test"):
test_input = PTBInput(config=eval_config,
x_data=test_x,
y_data=test_y,
name="TestInput")
with tf.variable_scope("Model", reuse=True, initializer=initializer):
mtest = PTBModel(is_training=False,
config=eval_config,
input_=test_input)
# models = {"Train": m, "Valid": mvalid, "Test": mtest}
# for name, model in models.items():
# model.export_ops(name)
# metagraph = tf.train.export_meta_graph()
# if tf.__version__ < "1.1.0" and FLAGS.num_gpus > 1:
# raise ValueError("num_gpus > 1 is not supported for TensorFlow versions "
# "below 1.1.0")
soft_placement = False
# if FLAGS.num_gpus > 1:
# soft_placement = True
# util.auto_parallel(metagraph, m)
#
# with tf.Graph().as_default():
# tf.train.import_meta_graph(metagraph)
# # tf.train.import_meta_graph("models/model.ckpt-0.meta")
# for model in models.values():
# model.import_ops()
sv = tf.train.Supervisor(logdir=FLAGS.save_path)
# sv = tf.train.Supervisor()
config_proto = tf.ConfigProto(allow_soft_placement=soft_placement)
with sv.managed_session(config=config_proto) as session:
for i in range(config.max_max_epoch):
lr_decay = config.lr_decay**max(i + 1 - config.max_epoch, 0.0)
m.assign_lr(session, config.learning_rate * lr_decay)
print("Epoch: %d Learning rate: %.3f" % (i + 1, session.run(m.lr)))
train_perplexity, cost = run_epoch(session,
m,
eval_op=m.train_op,
verbose=True)
print("Epoch: %d Train Perplexity: %.3f Cost: %.3f" %
(i + 1, train_perplexity, cost))
valid_perplexity, cost = run_epoch(session, mvalid)
print("Epoch: %d Valid Perplexity: %.3f Cost: %.3f" %
(i + 1, valid_perplexity, cost))
test_perplexity, cost = run_epoch(session, mtest)
print("Test Perplexity: %.3f accuracy: %.3f" %
(test_perplexity, 100 - cost))
if FLAGS.save_path:
print("Saving model to %s." % FLAGS.save_path)
sv.saver.save(session, FLAGS.save_path, global_step=sv.global_step)
def main(_):
if not FLAGS.data_path:
raise ValueError("Must set --data_path to PTB data directory")
gpus = [
x.name for x in device_lib.list_local_devices() if x.device_type == "GPU"
]
if FLAGS.num_gpus > len(gpus):
raise ValueError(
"Your machine has only %d gpus "
"which is less than the requested --num_gpus=%d."
% (len(gpus), FLAGS.num_gpus))
i = 0
data = []
L = file_name(FLAGS.data_path)
for dir in L:
if i == 0:
data = np.loadtxt(dir)
else:
tmp = np.loadtxt(dir)
data = np.vstack((data, tmp))
i += 1
random.shuffle(data)
train_x, test_x, train_y, test_y = train_test_split(data[:, :-1],
data[:, -1],
test_size=0.2,
random_state=0)
train_x, valid_x, train_y, valid_y = train_test_split(train_x[:, :],
train_y[:],
test_size=0.2,
random_state=42)
config = get_config()
eval_config = get_config()
eval_config.batch_size = 1
train_epoch = len(train_y) // config.batch_size
valid_epoch = len(valid_y) // config.batch_size
test_epoch = len(test_y) // eval_config.batch_size
'''
train_x1 = tf.convert_to_tensor(train_x1, name="train_datax1", dtype=tf.float32)
train_y1 = tf.convert_to_tensor(train_y1, name="train_datay1", dtype=tf.int32)
valid_x1 = tf.convert_to_tensor(valid_x1, name="valid_datax1", dtype=tf.float32)
valid_y1 = tf.convert_to_tensor(valid_y1, name="valid_datay1", dtype=tf.int32)
test_x1 = tf.convert_to_tensor(test_x1, name="test_datax1", dtype=tf.float32)
test_y1 = tf.convert_to_tensor(test_y1, name="test_datay1", dtype=tf.int32)
'''
with tf.Graph().as_default(), tf.Session() as session:
initializer = tf.random_uniform_initializer(-config.init_scale,
config.init_scale)
with tf.name_scope("Train"):
with tf.variable_scope("Model", reuse=tf.AUTO_REUSE, initializer=initializer):
m = PTB(config=config, is_training=True, name="Train")
tf.summary.scalar("Training Loss", m.cost)
tf.summary.scalar("Learning Rate", m.lr)
summary_op_m = tf.summary.merge_all()
with tf.name_scope("Valid"):
with tf.variable_scope("Model", reuse=True, initializer=initializer):
mvalid = PTB(config=config, is_training=False, name="Valid")
with tf.name_scope("Test"):
with tf.variable_scope("Model", reuse=True, initializer=initializer):
mtest = PTB(config=eval_config, is_training=False, name="Test")
summary_writer = tf.summary.FileWriter('./lstm_logs',session.graph)
tf.initialize_all_variables().run() # 对参数变量初始化
for i in range(config.max_max_epoch):
lr_decay = config.lr_decay ** max(i + 1 - config.max_epoch, 0.0)
m.assign_lr(session, config.learning_rate * lr_decay)
print("Epoch: %d Learning rate: %.3f" % (i + 1, session.run(m.lr)))
train_perplexity, cost, accuracy = run_epoch(session, m, train_x, train_y, train_epoch, eval_op=m.train_op,
verbose=True)
print("Epoch: %d Train Perplexity: %.3f Cost: %.3f Accuracy: %.3f" % (i + 1, train_perplexity, cost, accuracy))
valid_perplexity, cost, accuracy = run_epoch(session, mvalid, valid_x, valid_y, valid_epoch)
print("Epoch: %d Valid Perplexity: %.3f Cost: %.3f Accuracy: %.3f" % (i + 1, valid_perplexity, cost, accuracy))
test_perplexity, cost, accuracy = run_epoch(session, mtest, test_x, test_y, test_epoch)
print("Test Perplexity: %.3f accuracy: %.3f" % (test_perplexity, accuracy))
saver = tf.train.Saver()
saver.save(session, './model/model.ckpt', global_step=i)
summary_str = run_epoch_summary(session, m, summary_op_m, train_x, train_y, eval_op=m.train_op)
summary_writer.add_summary(summary_str, i)
from tensorflow.contrib.learn.python.learn.estimators._sklearn import train_test_split
from tensorflow.python.keras import Sequential
from tensorflow.python.keras.layers import Dense, Dropout
numpy.random.seed(2)
# loading load prima indians diabetes dataset, past 5 years of medical history
dataset = numpy.loadtxt("prima-indians-diabetes.csv", delimiter=",")
# split into input (X) and output (Y) variables, splitting csv data
X = dataset[:, 0:8]
Y = dataset[:, 8]
# split X, Y into a train and test set
x_train, x_test, y_train, y_test = train_test_split(X,
Y,
test_size=0.2,
random_state=42)
# create model, add dense layers one by one specifying activation function
model = Sequential()
model.add(Dense(15, input_dim=8,
activation='relu')) # input layer requires input_dim param
model.add(Dense(10, activation='relu'))
model.add(Dense(8, activation='relu'))
model.add(Dropout(.2))
model.add(Dense(1, activation='sigmoid')
) # sigmoid instead of relu for final probability between 0 and 1
# compile the model, adam gradient descent (optimized)
model.compile(loss="binary_crossentropy",
optimizer="adam",
def run():
# 从本地缓存加载数据
title_count, title_set, genres2int, features, targets_values, \
ratings, users, movies, data, movies_orig, users_orig = pickle.load(open('preprocess.p', mode='rb'))
# 基本参数
# 嵌入矩阵的维度
embed_dim = 32
# 用户ID个数
# take 第一个参数为哪一列，第二个为轴参数
uid_max = max(features.take(0, 1)) + 1 # 6040
# 性别个数
gender_max = max(features.take(2, 1)) + 1 # 1 + 1 = 2
# 年龄类别个数
age_max = max(features.take(3, 1)) + 1 # 6 + 1 = 7
# 职业个数
job_max = max(features.take(4, 1)) + 1 # 20 + 1 = 21
# 电影ID个数
movie_id_max = max(features.take(1, 1)) + 1 # 3952
# 电影类型个数
movie_categories_max = max(genres2int.values()) + 1 # 18 + 1 = 19
# 电影名单词个数
movie_title_max = len(title_set) # 5216
# 对电影类型嵌入向量做加和操作的标志，考虑过使用mean做平均，但是没实现mean
combiner = "sum"
# 电影名长度
sentences_size = title_count # = 15
# 文本卷积滑动窗口，分别滑动2, 3, 4, 5个单词
window_sizes = {2, 3, 4, 5}
# 文本卷积核数量
filter_num = 8
# 电影ID转下标的字典，数据集中电影ID跟下标不一致，比如第5行的数据电影ID不一定是5
movieid2idx = {val[0]: i for i, val in enumerate(movies.values)}
# 超参数
# Number of Epochs
num_epochs = 5
# Batch Size
batch_size = 256
dropout_keep = 0.5
# Learning Rate
learning_rate = 0.0001
# Show stats for every n number of batches
show_every_n_batches = 20
save_dir = './save'
def get_user_embedding(uid, user_gender, user_age, user_job):
"""
定义User的嵌入矩阵
:param uid:
:param user_gender:
:param user_age:
:param user_job:
:return:
"""
with tf.name_scope("user_embedding"):
# 创建一个uid_max * embed_dim 的矩阵
uid_embed_matrix = tf.Variable(tf.random_uniform([uid_max, embed_dim], -1, 1), name="uid_embed_matrix")
uid_embed_layer = tf.nn.embedding_lookup(uid_embed_matrix, uid, name="uid_embed_layer")
gender_embed_matrix = tf.Variable(tf.random_uniform([gender_max, embed_dim // 2], -1, 1),
name="gender_embed_matrix")
gender_embed_layer = tf.nn.embedding_lookup(gender_embed_matrix, user_gender, name="gender_embed_layer")
age_embed_matrix = tf.Variable(tf.random_uniform([age_max, embed_dim // 2], -1, 1), name="age_embed_matrix")
age_embed_layer = tf.nn.embedding_lookup(age_embed_matrix, user_age, name="age_embed_layer")
job_embed_matrix = tf.Variable(tf.random_uniform([job_max, embed_dim // 2], -1, 1), name="job_embed_matrix")
job_embed_layer = tf.nn.embedding_lookup(job_embed_matrix, user_job, name="job_embed_layer")
return uid_embed_layer, gender_embed_layer, age_embed_layer, job_embed_layer
def get_user_feature_layer(uid_embed_layer, gender_embed_layer, age_embed_layer, job_embed_layer):
"""
获取用户特征网络
:param uid_embed_layer:
:param gender_embed_layer:
:param age_embed_layer:
:param job_embed_layer:
:return:
"""
with tf.name_scope("user_fc"):
# 第一层全连接
uid_fc_layer = tf.layers.dense(uid_embed_layer, embed_dim, name="uid_fc_layer", activation=tf.nn.relu)
gender_fc_layer = tf.layers.dense(gender_embed_layer, embed_dim, name="gender_fc_layer", activation=tf.nn.relu)
age_fc_layer = tf.layers.dense(age_embed_layer, embed_dim, name="age_fc_layer", activation=tf.nn.relu)
job_fc_layer = tf.layers.dense(job_embed_layer, embed_dim, name="job_fc_layer", activation=tf.nn.relu)
# 第二层全连接， 上面每一个输出连接起来
# (?, 1, 128), 0: bactch, 1: height, 2:width
user_combine_layer = tf.concat([uid_fc_layer, gender_fc_layer, age_fc_layer, job_fc_layer], 2)
user_combine_layer = tf.contrib.layers.fully_connected(user_combine_layer, 200, tf.tanh) # (?, 1, 200)
# 把输出结构重新编排
user_combine_layer_flat = tf.reshape(user_combine_layer, [-1, 200])
return user_combine_layer, user_combine_layer_flat
def get_movie_id_embed_layer(movie_id):
"""
movieID 嵌入层
:param movie_id:
:return:
"""
with tf.name_scope("movie_embedding"):
movie_id_embed_matrix = tf.Variable(tf.random_uniform([movie_id_max, embed_dim], -1, 1), # -1， 1 表示最小值和最大值
name="movie_id_embed_matrix")
movie_id_embed_layer = tf.nn.embedding_lookup(movie_id_embed_matrix, movie_id, name="movie_id_embed_layer")
return movie_id_embed_layer
def get_movie_categories_layers(movie_categories):
"""
movie标签嵌入层
:param movie_categories:
:return:
"""
with tf.name_scope("movie_categories_layers"):
movie_categories_embed_matrix = tf.Variable(tf.random_uniform([movie_categories_max, embed_dim], -1, 1),
name="movie_categories_embed_matrix")
movie_categories_embed_layer = tf.nn.embedding_lookup(movie_categories_embed_matrix, movie_categories,
name="movie_categories_embed_layer")
# 这里可以求和 或者求平均
if combiner == "sum":
# 把每一行的值求和，即把左右的category 对应的特征进行相加
movie_categories_embed_layer = tf.reduce_sum(movie_categories_embed_layer, axis=1, keep_dims=True)
# elif combiner == "mean":
return movie_categories_embed_layer
def get_movie_cnn_layer(movie_titles):
"""
movie 标题嵌入以及卷积
:param movie_titles:
:return:
"""
# 从嵌入矩阵中得到电影名对应的各个单词的嵌入向量
with tf.name_scope("movie_embedding"):
movie_title_embed_matrix = tf.Variable(tf.random_uniform([movie_title_max, embed_dim], -1, 1),
name="movie_title_embed_matrix")
movie_title_embed_layer = tf.nn.embedding_lookup(movie_title_embed_matrix, movie_titles,
name="movie_title_embed_layer")
# 增加一个chanels 维度
movie_title_embed_layer_expand = tf.expand_dims(movie_title_embed_layer, -1) # -1 表示最后一维
# 对文本嵌入层使用不同尺寸的卷积核做卷积和最大池化
pool_layer_lst = []
for window_size in window_sizes:
with tf.name_scope("movie_txt_conv_maxpool_{}".format(window_size)):
# 截断的正太分布
filter_weights = tf.Variable(tf.truncated_normal([window_size, embed_dim, 1, filter_num], stddev=0.1),
name="filter_weights")
filter_bias = tf.Variable(tf.constant(0.1, shape=[filter_num]), name="filter_bias")
conv_layer = tf.nn.conv2d(movie_title_embed_layer_expand, filter_weights, [1, 1, 1, 1], padding="VALID",
name="conv_layer")
relu_layer = tf.nn.relu(tf.nn.bias_add(conv_layer, filter_bias), name="relu_layer")
maxpool_layer = tf.nn.max_pool(relu_layer, [1, sentences_size - window_size + 1, 1, 1], [1, 1, 1, 1],
padding="VALID", name="maxpool_layer")
pool_layer_lst.append(maxpool_layer)
# Dropout层
with tf.name_scope("pool_dropout"):
pool_layer = tf.concat(pool_layer_lst, 3, name="pool_layer")
max_num = len(window_sizes) * filter_num
pool_layer_flat = tf.reshape(pool_layer, [-1, 1, max_num], name="pool_layer_flat")
dropout_layer = tf.nn.dropout(pool_layer_flat, dropout_keep_prob, name="dropout_layer")
return pool_layer_flat, dropout_layer
def get_movie_feature_layer(movie_id_embed_layer, movie_categories_embed_layer, dropout_layer):
"""
:param movie_id_embed_layer:
:param movie_categories_embed_layer:
:param dropout_layer:
:return:
"""
with tf.name_scope("movie_fc"):
# 第一层全连接
movie_id_fc_layer = tf.layers.dense(movie_id_embed_layer, embed_dim, name="movie_id_fc_layer",
activation=tf.nn.relu)
movie_categories_fc_layer = tf.layers.dense(movie_categories_embed_layer, embed_dim,
name="movie_categories_fc_layer", activation=tf.nn.relu)
# 第二层全连接
movie_combine_layer = tf.concat([movie_id_fc_layer, movie_categories_fc_layer, dropout_layer],
2) # (?, 1, 96)
movie_combine_layer = tf.contrib.layers.fully_connected(movie_combine_layer, 200, tf.tanh) # (?, 1, 200)
movie_combine_layer_flat = tf.reshape(movie_combine_layer, [-1, 200])
return movie_combine_layer, movie_combine_layer_flat
# 构建计算图
tf.reset_default_graph()
train_graph = tf.Graph()
with train_graph.as_default():
# 获取输入占位符
uid, user_gender, user_age, user_job, movie_id, movie_categories, movie_titles, targets, lr, dropout_keep_prob = get_inputs()
# 获取User的4个嵌入向量
uid_embed_layer, gender_embed_layer, age_embed_layer, job_embed_layer = get_user_embedding(uid, user_gender,
user_age, user_job)
# 得到用户特征
user_combine_layer, user_combine_layer_flat = get_user_feature_layer(uid_embed_layer, gender_embed_layer,
age_embed_layer, job_embed_layer)
# 获取电影ID的嵌入向量
movie_id_embed_layer = get_movie_id_embed_layer(movie_id)
# 获取电影类型的嵌入向量
movie_categories_embed_layer = get_movie_categories_layers(movie_categories)
# 获取电影名的特征向量
pool_layer_flat, dropout_layer = get_movie_cnn_layer(movie_titles)
# 得到电影特征
movie_combine_layer, movie_combine_layer_flat = get_movie_feature_layer(movie_id_embed_layer,
movie_categories_embed_layer,
dropout_layer)
# 计算出评分，要注意两个不同的方案，inference的名字（name值）是不一样的，后面做推荐时要根据name取得tensor
with tf.name_scope("inference"):
# 将用户特征和电影特征作为输入，经过全连接，输出一个值的方案
# inference_layer = tf.concat([user_combine_layer_flat, movie_combine_layer_flat], 1) #(?, 200)
# inference = tf.layers.dense(inference_layer, 1,
# kernel_initializer=tf.truncated_normal_initializer(stddev=0.01),
# kernel_regularizer=tf.nn.l2_loss, name="inference")
# 简单的将用户特征和电影特征做矩阵乘法得到一个预测评分
# inference = tf.matmul(user_combine_layer_flat, tf.transpose(movie_combine_layer_flat))
inference = tf.reduce_sum(user_combine_layer_flat * movie_combine_layer_flat, axis=1)
inference = tf.expand_dims(inference, axis=1)
with tf.name_scope("loss"):
# MSE损失，将计算值回归到评分
cost = tf.losses.mean_squared_error(targets, inference)
loss = tf.reduce_mean(cost)
# 优化损失
# train_op = tf.train.AdamOptimizer(lr).minimize(loss) #cost
global_step = tf.Variable(0, name="global_step", trainable=False)
optimizer = tf.train.AdamOptimizer(lr)
gradients = optimizer.compute_gradients(loss) # cost
train_op = optimizer.apply_gradients(gradients, global_step=global_step)
import time
import datetime
losses = {'train': [], 'test': []}
with tf.Session(graph=train_graph) as sess:
# 搜集数据给tensorBoard用
# Keep track of gradient values and sparsity
grad_summaries = []
for g, v in gradients:
if g is not None:
grad_hist_summary = tf.summary.histogram("{}/grad/hist".format(v.name.replace(':', '_')), g)
sparsity_summary = tf.summary.scalar("{}/grad/sparsity".format(v.name.replace(':', '_')),
tf.nn.zero_fraction(g))
grad_summaries.append(grad_hist_summary)
grad_summaries.append(sparsity_summary)
grad_summaries_merged = tf.summary.merge(grad_summaries)
# Output directory for models and summaries
timestamp = str(int(time.time()))
out_dir = os.path.abspath(os.path.join(os.path.curdir, "runs", timestamp))
print("Writing to {}\n".format(out_dir))
# Summaries for loss and accuracy
loss_summary = tf.summary.scalar("loss", loss)
# Train Summaries
train_summary_op = tf.summary.merge([loss_summary, grad_summaries_merged])
train_summary_dir = os.path.join(out_dir, "summaries", "train")
train_summary_writer = tf.summary.FileWriter(train_summary_dir, sess.graph)
# Inference summaries
inference_summary_op = tf.summary.merge([loss_summary])
inference_summary_dir = os.path.join(out_dir, "summaries", "inference")
inference_summary_writer = tf.summary.FileWriter(inference_summary_dir, sess.graph)
sess.run(tf.global_variables_initializer())
saver = tf.train.Saver()
for epoch_i in range(num_epochs):
# 将数据集分成训练集和测试集，随机种子不固定
train_X, test_X, train_y, test_y = train_test_split(features,
targets_values,
test_size=0.2,
random_state=0)
train_batches = get_batches(train_X, train_y, batch_size)
test_batches = get_batches(test_X, test_y, batch_size)
# 训练的迭代，保存训练损失
for batch_i in range(len(train_X) // batch_size):
x, y = next(train_batches)
categories = np.zeros([batch_size, 18])
for i in range(batch_size):
categories[i] = x.take(6, 1)[i]
titles = np.zeros([batch_size, sentences_size])
for i in range(batch_size):
titles[i] = x.take(5, 1)[i]
feed = {
uid: np.reshape(x.take(0, 1), [batch_size, 1]),
user_gender: np.reshape(x.take(2, 1), [batch_size, 1]),
user_age: np.reshape(x.take(3, 1), [batch_size, 1]),
user_job: np.reshape(x.take(4, 1), [batch_size, 1]),
movie_id: np.reshape(x.take(1, 1), [batch_size, 1]),
movie_categories: categories, # x.take(6,1)
movie_titles: titles, # x.take(5,1)
targets: np.reshape(y, [batch_size, 1]),
dropout_keep_prob: dropout_keep, # dropout_keep
lr: learning_rate}
step, train_loss, summaries, _ = sess.run([global_step, loss, train_summary_op, train_op], feed) # cost
losses['train'].append(train_loss)
train_summary_writer.add_summary(summaries, step) #
# Show every <show_every_n_batches> batches
if (epoch_i * (len(train_X) // batch_size) + batch_i) % show_every_n_batches == 0:
time_str = datetime.datetime.now().isoformat()
print('{}: Epoch {:>3} Batch {:>4}/{} train_loss = {:.3f}'.format(
time_str,
epoch_i,
batch_i,
(len(train_X) // batch_size),
train_loss))
# 使用测试数据的迭代
for batch_i in range(len(test_X) // batch_size):
x, y = next(test_batches)
categories = np.zeros([batch_size, 18])
for i in range(batch_size):
categories[i] = x.take(6, 1)[i]
titles = np.zeros([batch_size, sentences_size])
for i in range(batch_size):
titles[i] = x.take(5, 1)[i]
feed = {
uid: np.reshape(x.take(0, 1), [batch_size, 1]),
user_gender: np.reshape(x.take(2, 1), [batch_size, 1]),
user_age: np.reshape(x.take(3, 1), [batch_size, 1]),
user_job: np.reshape(x.take(4, 1), [batch_size, 1]),
movie_id: np.reshape(x.take(1, 1), [batch_size, 1]),
movie_categories: categories, # x.take(6,1)
movie_titles: titles, # x.take(5,1)
targets: np.reshape(y, [batch_size, 1]),
dropout_keep_prob: 1,
lr: learning_rate}
step, test_loss, summaries = sess.run([global_step, loss, inference_summary_op], feed) # cost
# 保存测试损失
losses['test'].append(test_loss)
inference_summary_writer.add_summary(summaries, step) #
time_str = datetime.datetime.now().isoformat()
if (epoch_i * (len(test_X) // batch_size) + batch_i) % show_every_n_batches == 0:
print('{}: Epoch {:>3} Batch {:>4}/{} test_loss = {:.3f}'.format(
time_str,
epoch_i,
batch_i,
(len(test_X) // batch_size),
test_loss))
# Save Model
saver.save(sess, save_dir) # , global_step=epoch_i
print('Model Trained and Saved')
# save_params((save_dir))
# load_dir = load_params()
plt.plot(losses['train'], label='Training loss')
plt.legend()
_ = plt.ylim()
nos = [
filename for filename in os.listdir('originals/no')
if filename.lower().endswith('.jpg')
]
for filename in nos:
image = cv2.imread(f'originals/no/{filename}')
image = cv2.resize(image, (299, 299))
image = img_to_array(image)
data.append(image)
labels.append(0) # 0 for no firetruck
data = np.array(data, dtype='float') / 255
labels = np.array(labels)
train_x, test_x, train_y, test_y = train_test_split(data,
labels,
test_size=0.25,
random_state=24601)
train_y = to_categorical(train_y, num_classes=2)
test_y = to_categorical(test_y, num_classes=2)
# train the model on the new data for a few epochs
history1 = model.fit(train_x,
train_y,
batch_size=64,
epochs=3,
validation_data=(test_x, test_y))
with open('history_new_layers.json', 'w') as f:
json.dump(history1.history, f)
# at this point, the top layers are well trained and we can start fine-tuning
def testIrisES(self):
random.seed(42)
iris = datasets.load_iris()
x_train, x_test, y_train, y_test = train_test_split(iris.data,
iris.target,
test_size=0.2,
random_state=42)
x_train, x_val, y_train, y_val = train_test_split(x_train,
y_train,
test_size=0.2,
random_state=42)
val_monitor = learn.monitors.ValidationMonitor(
x_val,
y_val,
every_n_steps=50,
early_stopping_rounds=100,
early_stopping_metric='loss',
early_stopping_metric_minimize=False)
feature_columns = learn.infer_real_valued_columns_from_input(iris.data)
# classifier without early stopping - overfitting
classifier1 = learn.DNNClassifier(feature_columns=feature_columns,
hidden_units=[10, 20, 10],
n_classes=3)
classifier1.fit(x_train, y_train, steps=1000)
_ = accuracy_score(y_test, classifier1.predict(x_test))
# Full 1000 steps, 19 summaries and no evaluation summary:
# 1 summary of net at step 1
# 9 x (1 summary of net and 1 summary of global step) for steps 101, 201,...
self.assertEqual(19, len(_get_summary_events(classifier1.model_dir)))
with self.assertRaises(ValueError):
_get_summary_events(classifier1.model_dir + '/eval')
# classifier with early stopping - improved accuracy on testing set
classifier2 = learn.DNNClassifier(
hidden_units=[10, 20, 10],
feature_columns=feature_columns,
n_classes=3,
config=tf.contrib.learn.RunConfig(save_checkpoints_secs=1))
classifier2.fit(x_train, y_train, monitors=[val_monitor], steps=2000)
_ = accuracy_score(y_val, classifier2.predict(x_val))
_ = accuracy_score(y_test, classifier2.predict(x_test))
# Note, this test is unstable, so not checking for equality.
# See stability_test for examples of stability issues.
if val_monitor.early_stopped:
self.assertLess(val_monitor.best_step, 2000)
# Note, due to validation monitor stopping after the best score occur,
# the accuracy at current checkpoint is less.
# TODO(ipolosukhin): Time machine for restoring old checkpoints?
# flaky, still not always best_value better then score2 value.
# self.assertGreater(val_monitor.best_value, score2_val)
# Early stopped, unstable so checking only < then max.
self.assertLess(len(_get_summary_events(classifier2.model_dir)),
21)
# Eval typically has ~6 events, but it varies based on the run.
self.assertLess(
len(_get_summary_events(classifier2.model_dir + '/eval')), 8)
import os
import matplotlib.pyplot as plt
import sys
import numpy
import tensorflow as tf
from tensorflow.contrib.learn.python.learn.estimators._sklearn import train_test_split
seed = 0
numpy.random.seed(seed)
tf.set_random_seed(seed)
npz_file = numpy.load('NPInter.npz')
npz_x_list = numpy.hstack([npz_file['XP'], npz_file['XR']])
X_train, X_test, Y_train, Y_test = train_test_split(npz_x_list,
npz_file['Y'],
test_size=0.1,
random_state=seed)
model = Sequential()
model.add(Conv1D(32, kernel_size=4, input_shape=(739, 1), activation='relu'))
model.add(Conv1D(64, 4, activation='relu'))
model.add(MaxPooling1D(pool_size=2))
model.add(Dropout(0.25))
model.add(Flatten()) # 2D -> 1D
model.add(Dense(128, activation='relu'))
model.add(Dense(32, activation='relu'))
model.add(Dropout(0.5))
model.add(Dense(1, activation='sigmoid'))
model.compile(loss='binary_crossentropy',
optimizer='adam',
return np.squeeze(H.T)
f = open("train.pkl", 'rb')
x_train, y_train = pkl.load(f)
f1 = open("hogged.pkl", 'rb')
x_train = pkl.load(f1)
f1.close()
x_train = np.asarray(x_train)
x_train = x_train.squeeze()
y_train = y_train.transpose()
y_train = y_train[0]
x_train, x_test, y_train, y_test = train_test_split(x_train,
y_train,
test_size=0.1)
print(x_train.shape[0], 'train samples')
print(x_test.shape[0], 'test samples')
y_train = keras.utils.to_categorical(y_train, num_classes)
y_test = keras.utils.to_categorical(y_test, num_classes)
name = "Bmodel2.h5"
layers = [
Dense(1000, activation="relu", input_shape=(x_train[0].shape[0], )),
Dense(500, activation="relu"),
Dense(100, activation="relu"),
Dense(36, activation="softmax")
]
batch_size = 100
learning_rate = 0.01
samples_per_epoch = 100 # Assuming 10,000 images
nb_epoch = 25
test_size = 0.3
keep_prob = 0.5
# </editor-fold>
# <editor-fold desc="Load Data">
data_df = pd.read_csv(os.path.join(dataset_dir + data, 'driving_log.csv'))
X = data_df[['center', 'left', 'right']].values
y = data_df['steering'].values
X_train, X_valid, y_train, y_valid = train_test_split(X,
y,
test_size=test_size,
random_state=0)
# </editor-fold>
class Model():
def __init__(self, INPUT_SHAPE, keep_prob):
self.model = self.load(INPUT_SHAPE, keep_prob)
def load(self, INPUT_SHAPE, keep_prob):
model = Sequential()
model.add(Lambda(lambda x: x / 127.5 - 1.0, input_shape=INPUT_SHAPE))
model.add(Conv2D(24, 5, 5, activation='elu', subsample=(2, 2)))
model.add(Conv2D(36, 5, 5, activation='elu', subsample=(2, 2)))
if dir.startswith('.'):
continue
img = cv2.imread(os.path.join(root, file), cv2.COLOR_BGR2GRAY)
img = cv2.resize(img, (28, 28), interpolation=cv2.INTER_CUBIC)
labels.append(dir)
datasets.append(img)
datasets = np.array(datasets)
labels = np.array(labels)
# 处理数据集
datasets = datasets.astype('float32')
datasets /= 255
datasets = datasets.reshape(datasets.shape[0], 28, 28, 1)
x_train, x_test, y_train, y_test = train_test_split(datasets,
labels,
test_size=0.3,
random_state=0)
y_prepare_train = []
for obj in y_train:
y_prepare_train.append(int(re.sub("\D", "", obj)) - 1)
y_prepare_test = []
for obj in y_test:
y_prepare_test.append(int(re.sub("\D", "", obj)) - 1)
y_train = keras.utils.to_categorical(y_prepare_train, type_num)
y_test = keras.utils.to_categorical(y_prepare_test, type_num)
model = Sequential()
model.add(
from sklearn.metrics import precision_score
from sklearn.metrics import recall_score
from sklearn.metrics import f1_score
from sklearn.model_selection import cross_val_predict
import matplotlib.pyplot as plt
from sklearn.preprocessing import StandardScaler
dota2results = np.loadtxt('data/dota2Dataset/dota2Train.csv', delimiter=',')
dota2x = dota2results[:, 1:]
dota2y = dota2results[:, 0]
spamx = spambase[:, :57]
spamy = spambase[:, 57]
from sklearn.preprocessing import StandardScaler
from tensorflow.contrib.learn.python.learn.estimators._sklearn import train_test_split
X_train, X_test, Y_train, Y_test = train_test_split(spamx, spamy, test_size=0.1, random_state=0)
spamx = spambase[:, :57]
spamy = spambase[:, 57]
# 对数据的训练集进行标准化
ss = StandardScaler()
# X_train = ss.fit_transform(X_train) # 先拟合数据在进行标准化
lr = LogisticRegressionCV(multi_class="ovr", fit_intercept=True, Cs=np.logspace(-2, 2, 20), cv=2, penalty="l2",
solver="lbfgs", tol=0.01)
re = lr.fit(X_train, Y_train)
#
# # 预测
# X_test = ss.transform(X_test) # 数据标准化
# Y_predict = lr.predict(X_test) # 预测
# Dota2数据
dx_train, dx_test, dy_train, dy_test = train_test_split(dota2x, dota2y, test_size=0.1, random_state=0)
