Python 使用LSTM进行序列分类,检查输入时出错
我正在用LSTM构建我的第一个神经网络,我的输入大小有一个错误 我猜错误在于输入参数、尺寸、尺寸,但我无法理解错误Python 使用LSTM进行序列分类,检查输入时出错,python,tensorflow,machine-learning,keras,lstm,Python,Tensorflow,Machine Learning,Keras,Lstm,我正在用LSTM构建我的第一个神经网络,我的输入大小有一个错误 我猜错误在于输入参数、尺寸、尺寸,但我无法理解错误 print df.shape data_dim = 13 timesteps = 13 num_classes = 1 batch_size = 32 model = Sequential() model.add(LSTM(32, return_sequences = True, stateful = True, batch_input_shape
print df.shape
data_dim = 13
timesteps = 13
num_classes = 1
batch_size = 32
model = Sequential()
model.add(LSTM(32, return_sequences = True, stateful = True,
batch_input_shape = (batch_size, timesteps, data_dim)))
model.add(LSTM(32, return_sequences = True, stateful = True))
model.add(LSTM(32, stateful = True))
model.add(Dense(1, activation = 'relu'))
#Compile.
model.compile(loss = 'binary_crossentropy', optimizer = 'adam', metrics = ['accuracy'])
model.summary()
#Fit.
history = model.fit(data[train], label[train], epochs = iteraciones, verbose = 0)
#Eval.
scores = model.evaluate(data[test], label[test], verbose = 0)
#Save.
cvshistory.append(history)
cvscores.append(scores[1] * 100)
形状:
(303, 14)
summary:
_________________________________________________________________
Layer (type) Output Shape Param #
=================================================================
lstm_19 (LSTM) (32, 13, 32) 5888
_________________________________________________________________
lstm_20 (LSTM) (32, 13, 32) 8320
_________________________________________________________________
lstm_21 (LSTM) (32, 32) 8320
_________________________________________________________________
dense_171 (Dense) (32, 1) 33
=================================================================
Total params: 22,561
Trainable params: 22,561
Non-trainable params: 0
_________________________________________________________________
错误输出告诉我以下信息:
---> 45 history = model.fit(data[train], label[train], epochs = iteraciones, verbose = 0)
ValueError: Error when checking input: expected lstm_19_input to have 3 dimensions, but got array with shape (226, 13)
LSTM需要输入形状
(批次大小、时间步长、特征大小)
。您只传递二维特征。由于timesteps=13
您需要在输入中再添加一个维度
如果数据是numpy数组,则:
data=data[…,np.newaxis]
应该这样做
现在数据的形状将是
(批量大小、时间步长、特征)
即<代码>(226,13,1)LSTM需要输入形状(批次大小、时间步长、特征大小)
。您只传递二维特征。由于timesteps=13
您需要在输入中再添加一个维度
如果数据是numpy数组,则:
data=data[…,np.newaxis]
应该这样做
现在数据的形状将是(批量大小、时间步长、特征)
即<代码>(226,13,1)