def mnist(layers, # pylint: disable=invalid-name
activation="sigmoid",
batch_size=128,
mode="train"):
"""Mnist classification with a multi-layer perceptron."""
if activation == "sigmoid":
activation_op = tf.sigmoid
elif activation == "relu":
activation_op = tf.nn.relu
else:
raise ValueError("{} activation not supported".format(activation))
# Data.
data = mnist_dataset.load_mnist()
data = getattr(data, mode)
images = tf.constant(data.images, dtype=tf.float32, name="MNIST_images")
images = tf.reshape(images, [-1, 28, 28, 1])
labels = tf.constant(data.labels, dtype=tf.int64, name="MNIST_labels")
# Network.
mlp = nn.MLP(list(layers) + [10],
activation=activation_op,
initializers=_nn_initializers)
network = nn.Sequential([nn.BatchFlatten(), mlp])
def build():
indices = tf.random_uniform([batch_size], 0, data.num_examples, tf.int64)
batch_images = tf.gather(images, indices)
batch_labels = tf.gather(labels, indices)
output = network(batch_images)
return _xent_loss(output, batch_labels)
return build
def _init_(self, modelName='MNIST.model'):
self.modelName = modelName
self.root = self.windows()
self.image1 = Image.new("RGB", (window_width, window_height), (255, 255, 255))
self.draw = ImageDraw.Draw(self.image1)
self.mlp = nn.MLP(784, 1000, 10)
model = cLinks.Classifier(self.mlp)
serializers.load_hdf5(self.modelNamem, model)
def main():
# CSVファイルを読込
csv = pd.read_csv('./' + DATASET_PATH, engine='python')
# データをx(入力値)とy(出力値)に分割する
x = pd.DataFrame()
y = pd.DataFrame()
for i, key in enumerate(csv.columns):
if i == 0:
y[key] = csv[key]
else:
x[key] = csv[key]
# スケーリングしない場合
# ax = x
ay = y
# 標準化する場合
ax = (x - x.mean()) / x.std()
# ay = (y - y.mean()) / y.std()
# x, yを教師データとテストデータに分割する
train_len = TRAIN_LENGTH
train_x = train_y = test_x = test_y = pd.DataFrame()
train_x = ax[0:train_len]
train_y = ay[0:train_len]
test_x = ax[train_len + 1:len(x)]
test_y = ay[train_len + 1:len(y)]
# indexを修正
train_x = train_x.reset_index()
train_y = train_y.reset_index()
del train_x['index']
del train_y['index']
test_x = test_x.reset_index()
test_y = test_y.reset_index()
del test_x['index']
del test_y['index']
model = nn.MLP(LAYER_NUM, OUTPUT_LAYER_NUM)
chainer.serializers.load_npz(MODEL_PATH, model)
# テストを実行
test(train_x, train_y, 'train', model)
test(test_x, test_y, 'test', model)
def main():
np.random.seed(100)
X_train, y_train = read_data('images_train.csv', 'labels_train.csv')
y_train = one_hot_labels(y_train).T
print(X_train.shape)
print(y_train.shape)
p = np.random.permutation(60000)
X_train = X_train[:, p]
y_train = y_train[:, p]
X_dev = X_train[:, 0:10000]
y_dev = y_train[:, 0:10000]
X_train = X_train[:, 10000:]
y_train = y_train[:, 10000:]
mean = np.mean(X_train)
std = np.std(X_train)
X_train = (X_train - mean) / std
X_dev = (X_dev - mean) / std
X_test, y_test = read_data('images_test.csv', 'labels_test.csv')
y_test = one_hot_labels(y_test).T
X_test = (X_test - mean) / std
model = nn.MLP(hidden_sizes=[300],
hidden_activation='sigmoid',
output_activation='softmax',
cost_function='cross_entropy')
costs = model.fit(X_train,
y_train,
k=10,
learning_rate=1,
num_epochs=30,
lmbd=0,
batch_size=1000,
shuffle=False)
for item in costs:
print(item)
preds = model.predict(X_test)
acc = accuracy(y_test, preds)
print('Accuracy: {}'.format(acc))
def cifar10(
path, # pylint: disable=invalid-name
conv_channels=None,
linear_layers=None,
batch_norm=True,
batch_size=128,
num_threads=4,
min_queue_examples=1000,
mode="train"):
"""Cifar10 classification with a convolutional network."""
# Data.
_maybe_download_cifar10(path)
# Read images and labels from disk.
if mode == "train":
filenames = [
os.path.join(path, CIFAR10_FOLDER, "data_batch_{}.bin".format(i))
for i in xrange(1, 6)
]
elif mode == "test":
filenames = [os.path.join(path, "test_batch.bin")]
else:
raise ValueError("Mode {} not recognised".format(mode))
depth = 3
height = 32
width = 32
label_bytes = 1
image_bytes = depth * height * width
record_bytes = label_bytes + image_bytes
reader = tf.FixedLengthRecordReader(record_bytes=record_bytes)
_, record = reader.read(tf.train.string_input_producer(filenames))
record_bytes = tf.decode_raw(record, tf.uint8)
label = tf.cast(tf.slice(record_bytes, [0], [label_bytes]), tf.int32)
raw_image = tf.slice(record_bytes, [label_bytes], [image_bytes])
image = tf.cast(tf.reshape(raw_image, [depth, height, width]), tf.float32)
# height x width x depth.
image = tf.transpose(image, [1, 2, 0])
image = tf.div(image, 255)
queue = tf.RandomShuffleQueue(
capacity=min_queue_examples + 3 * batch_size,
min_after_dequeue=min_queue_examples,
dtypes=[tf.float32, tf.int32],
shapes=[image.get_shape(), label.get_shape()])
enqueue_ops = [queue.enqueue([image, label]) for _ in xrange(num_threads)]
tf.train.add_queue_runner(tf.train.QueueRunner(queue, enqueue_ops))
# Network.
def _conv_activation(x): # pylint: disable=invalid-name
return tf.nn.max_pool(tf.nn.relu(x),
ksize=[1, 2, 2, 1],
strides=[1, 2, 2, 1],
padding="SAME")
conv = nn.ConvNet2D(output_channels=conv_channels,
kernel_shapes=[5],
strides=[1],
paddings=[nn.SAME],
activation=_conv_activation,
activate_final=True,
initializers=_nn_initializers,
use_batch_norm=batch_norm)
if batch_norm:
linear_activation = lambda x: tf.nn.relu(nn.BatchNorm()(x))
else:
linear_activation = tf.nn.relu
mlp = nn.MLP(list(linear_layers) + [10],
activation=linear_activation,
initializers=_nn_initializers)
network = nn.Sequential([conv, nn.BatchFlatten(), mlp])
def build():
image_batch, label_batch = queue.dequeue_many(batch_size)
label_batch = tf.reshape(label_batch, [batch_size])
output = network(image_batch)
return _xent_loss(output, label_batch)
return build
def main():
# 学習処理
def train(batch_size, epoch_size):
np.random.seed(seed=4)
loss_log = []
for epoch in range(epoch_size):
# ミニバッチ処理
sffindx = np.random.permutation(train_len)
for i in range(0, train_len, batch_size):
xx = Variable(
train_x.iloc[sffindx[i:(i + batch_size)],
range(len(train_x.columns))].values.astype(
np.float32))
yy = Variable(
train_y.iloc[sffindx[i:(i + batch_size)],
range(len(train_y.columns))].values.astype(
np.int32).flatten())
model.cleargrads()
pred_y = model(xx)
loss = F.softmax_cross_entropy(pred_y, yy)
loss.backward()
optimizer.update()
loss_log.append(loss.data)
print(str(epoch + 1) + '/' + str(epoch_size) + ' ステップ完了')
print(' loss = ' + str(loss_log[epoch]))
output_list = []
for loss in loss_log:
output_list.append(float(str(round(np.average(loss), 2))))
json.dump(
np.array(output_list).tolist(),
codecs.open('./output/loss.json', 'w', encoding='utf-8'))
plt.plot(loss_log)
plt.show()
# CSVファイルを読込
csv = pd.read_csv(DATASET_PATH, engine='python')
# データをx(入力値)とy(出力値)に分割する
x = pd.DataFrame()
y = pd.DataFrame()
for i, key in enumerate(csv.columns):
if i == 0:
y[key] = csv[key]
else:
x[key] = csv[key]
print(csv.corr()['rank'])
# スケーリングしない場合
# ax = x
ay = y
# 標準化する場合
ax = (x - x.mean()) / x.std()
# ay = (y - y.mean()) / y.std()
# x, yを教師データとテストデータに分割する
train_len = TRAIN_LENGTH
train_x = train_y = test_x = test_y = pd.DataFrame()
# 前半のデータを教師データとする場合
train_x = ax[0:train_len]
train_y = ay[0:train_len]
test_x = ax[train_len + 1:len(x)]
test_y = ay[train_len + 1:len(y)]
# indexを修正
train_x = train_x.reset_index()
train_y = train_y.reset_index()
del train_x['index']
del train_y['index']
test_x = test_x.reset_index()
test_y = test_y.reset_index()
del test_x['index']
del test_y['index']
# Optimizerの設定
model = nn.MLP(LAYER_NUM, OUTPUT_LAYER_NUM)
optimizer = optimizers.Adam(alpha=LEARNING_RATE)
optimizer.setup(model)
# 学習を実行
train(BATCH_SIZE, EPOCH_SIZE)
chainer.serializers.save_npz(MODEL_PATH, model)
# テストを実行
test(train_x, train_y, 'train', model)
test(test_x, test_y, 'test', model)
