这是indexloc提供的服务，不要输入任何密码
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fix: content #79

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fix: content #79

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2 changes: 1 addition & 1 deletion markdown/week4.md
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Expand Up @@ -109,7 +109,7 @@ ${{h}_{\Theta }}(x)=g(\Theta _{10}^{(2)}a_{0}^{(2)}+\Theta _{11}^{(2)}a_{1}^{(2)

上面进行的讨论中只是将特征矩阵中的一行（一个训练实例）喂给了神经网络，我们需要将整个训练集都喂给我们的神经网络算法来学习模型。

我们可以知道：每一个$a$都是由上一层所有的$x$和每一个$x$所对应的决定的。
我们可以知道：每一个$a$都是由上一层所有的$x$和每一个$x$所对应的$\theta$决定的。

（我们把这样从左到右的算法称为前向传播算法( **FORWARD PROPAGATION** )）

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