ReduceLROnPlateau提供了ADAM优化器错误 | ReduceLROnPlateau提供了ADAM优化器错误

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问题描述

是因为adam优化器本身会更改学习率.我收到一条错误消息:尝试使用未初始化的值Adam_1/lr"我想使用ReduceLRonPlateau没有意义，因为Adam会自动更改学习率.更新:代码:

Is it because adam optimizer changes the learning rate by itself.I get an error saying 'Attempting to use uninitialized value Adam_1/lr'I guess there is no point in using ReduceLRonPlateau as Adam will automatically change learning rate.Anyways i have updated the codeeUpdate:Code:

from keras.optimizers import Adam
model.compile(optimizer='adam',loss='mse')

 callback_reduce_lr=ReduceLROnPlateau(monitor='val_loss',
                                     factor=0.1,
                                     min_lr=1e-4,
                                     patience=0,
                                     verbose=1
                                    )
model.fit(xTrain,yTrain,epochs=100,batch_size=10,validation_data=(xTest,yTest),verbose=2,callbacks=[callback_reduce_lr])

错误://:尝试使用未初始化的值Adam_1/lr

Error://Attempting to use uninitialized value Adam_1/lr

我在某处读到在使用ReduceLROnPlateau时初始化adam不起作用，我也尝试过初始化权重，但是我遇到了同样的错误

I read somewhere that initializing adam doesnt work while working with ReduceLROnPlateau,,i have tried to initialize the weights too but i got the same error

推荐答案

如问题注释中所述，keras的ReduceLROnPleteau ，确实似乎适用于其默认参数:

As discussed in the question's comments, keras' ReduceLROnPleteau, does appear to work for its default parameters:

# keras' ReduceLROnPlateau callback default parameters:
from keras.callbacks import ReduceLROnPlateau
reduce_lr = ReduceLROnPlateau(monitor='val_loss', factor=0.1, patience=10,
                              verbose=0, mode='auto', min_delta=0.0001,
                              cooldown=0, min_lr=0)

我试图重新创建该错误，以尝试确定导致该错误的参数，但我没有.因此，我相信并非所有输入形状或模型都不会出现该错误.

I tried to recreate the error to try and identify which parameter causes it, but I couldn't. Due to this, I believe that the error doesn't appear for all input shapes or models.

但是，我可以肯定地说，使用正确的参数， ReduceLROnPlateau 可以与Adam一起使用.

However, I can say for sure that, with the correct parameters, ReduceLROnPlateau does work with Adam.

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