[英]KeyError: 'val_acc'
Below are some parameters for the model.fit_generator() function. Theses objects are saved in a list labeled callbacks.以下是 model.fit_generator() function 的一些参数。这些对象保存在标记为回调的列表中。
checkpoint = ModelCheckpoint(
model_file,
monitor= 'val_acc',
save_best_only=True)
early_stopping = EarlyStopping(
monitor='val_loss',
patience=5,
verbose=1,
restore_best_weights=True)
tensorboard = TensorBoard(
log_dir=log_dir,
batch_size=batch_size,
update_freq = 'batch')
reduce_lr = ReduceLROnPlateau(
monitor='val_loss',
patience=5,
cooldown=2,
min_lr=0.0000000001,
verbose=1)
#-----------------------------------------------------------------------------------------------------------------#
callbacks = [checkpoint, reduce_lr, early_stopping, tensorboard]
After creating the callback objects and parameters for the objects, I implement the layers and compile(which is not shown because it is irrelevant to the problem I am having).在为对象创建回调对象和参数后,我实现了层并编译(未显示,因为它与我遇到的问题无关)。 Then I run the model.fit_generator function (which uses the callback arguments above):
然后我运行 model.fit_generator function(使用上面的回调 arguments):
history = model.fit_generator(
train_generator,
steps_per_epoch = steps_per_epoch,
epochs=epochs,
verbose=2,
callbacks=callbacks,
validation_data=validation_generator,
validation_steps=validation_steps,
class_weight=class_weight)
The error that I am getting is:我得到的错误是:
KeyError: 'val_acc'
From my understanding this means that val_acc is not in the list.据我了解,这意味着 val_acc 不在列表中。 But it is.. so need help to understanding why I am getting this error.
但它是..所以需要帮助来理解为什么我会收到这个错误。
Edit:编辑:
Picture of the result before the error shows..[ https://i.stack.imgur.com/5lheg.png]错误前的结果图片显示..[ https://i.stack.imgur.com/5lheg.png]
You need to change monitor= 'val_acc'
to monitor='val_loss'
您需要将
monitor= 'val_acc'
更改为monitor='val_loss'
checkpoint = ModelCheckpoint(
model_file,
monitor='val_loss',
save_best_only=True)
Make sure you have used model.compile(metrics=['accuracy'])
, not Accuracy
or acc
.确保您使用
model.compile(metrics=['accuracy'])
,而不是Accuracy
或acc
。 Also in filepath use val_accuracy
.同样在文件路径中使用
val_accuracy
。 I have recently faced this problem.我最近遇到了这个问题。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.