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LSTM反向传播 #24

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xinbai240524 opened this issue May 31, 2023 · 3 comments
Open

LSTM反向传播 #24

xinbai240524 opened this issue May 31, 2023 · 3 comments

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@xinbai240524
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你好,我想问一下就是最后求权重梯度的。

1.我的各个门的输出变量的维度是(batchsize,hiddensize),输入变量x的维度是(batchsize,inputsize),因为我有batchsize嘛,所以想batchsize中的每个样本单独计算,但是现在的维度并不一致。δ(t)C⊙C(t−1)⊙f(t)⊙(1−f(t))计算完的维度是(hiddensize),然而,h(t−1)的维度也是(hiddensize),(h(t−1))T转置之后的维度是(1,hiddensize),这样进行矩阵乘法后,计算出来的维度是1,但我的Wfh的维度是(hiddensize,hiddensize)啊,后来对于这个问题,我用δ(t)C⊙C(t−1)⊙f(t)⊙(1−f(t)) * h(t−1).unsqueeze(dim=1),这样维度对了,请问这样可以嘛?

2.当为计算Wfx的维度的时候,δ(t)C⊙C(t−1)⊙f(t)⊙(1−f(t))计算完的维度是(hiddensize),然而,x(t)的维度是(inputsize),两者又出现不一致的情况,我又将矩阵乘法改成了δ(t)C⊙C(t−1)⊙f(t)⊙(1−f(t)).unsqueeze(dim=1) * x(t).unsqueeze(dim=0),不知道这样写严不严谨?

希望能得到您的帮助

@gengyp
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gengyp commented May 31, 2023 via email

@wangzhongqing
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wangzhongqing commented May 31, 2023 via email

@K-fall
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K-fall commented May 31, 2023 via email

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