我正在使用TensorFlow作为后端,使用Keras来训练一个LSTM网络。该网络用于能量负荷预测,数据集的大小为(32292,24)。但是程序运行时,从第一个时期开始就出现了损失值为Nan的情况。我该如何解决这个问题?
附注:就数据预处理而言,我将每个值除以100000,因为最初每个值都是4或5位数。因此,我的值应该在(0,1)范围内。
附注:就数据预处理而言,我将每个值除以100000,因为最初每个值都是4或5位数。因此,我的值应该在(0,1)范围内。
def build_model():
model = Sequential()
layers = [1, 50, 100, 1]
model.add(LSTM(input_dim=layers[0],output_dim=layers[1],return_sequenc
es = True))
model.add(Dropout(0.2))
model.add(LSTM(layers[2],return_sequences = False))
model.add(Dropout(0.2))
model.add(Dense(output_dim=layers[3]))
model.add(Activation("linear"))
start = time.time()
model.compile(loss="mse", optimizer="rmsprop")
print "Compilation Time : ", time.time() - start
return model
def run_network():
global_start_time = time.time()
epochs = 5000
model = build_model()
try:
model.fit(x_train, y_train,batch_size = 400, nb_epoch=epochs,validation_split=0.05)
predicted = model.predict(x_test)
predicted = np.reshape(predicted, (predicted.size,))
except KeyboardInterrupt:
print 'Training duration (s) : ', time.time() - global_start_time
try:
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(predicted[:100])
plt.show()
except Exception as e:
print str(e)
print 'Training duration (s) : ' , time.time() - global_start_time
return model, y_test, predicted