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loss计算错误 #74

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Yzichen opened this issue Dec 12, 2019 · 1 comment

Yzichen commented Dec 12, 2019

bug描述
3.7 3.9中计算交叉熵损失函数时使用tf.nn.CrossEntropyLoss()时，已经作了平均。
但是计算每一个epoch的损失时，又除了整个训练集样本的个数n ，这样对吗？

版本信息
pytorch:1.13
torchvision:0.4.2
torchtext:无
...

Tianhonghai mentioned this issue

自定义的sgd函数中的“除以batch_size”是否要省略需要视loss如何定义 #75

Closed

Owner

ShusenTang commented Dec 18, 2019

你说得对，应该除以batch数，因为tf.nn.CrossEntropyLoss()时已经沿batch维作了平均。

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