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【机器学习】-Week5.4 Implementation No

【机器学习】-Week5.4 Implementation No

作者: Kitty_风花 | 来源:发表于2019-12-29 09:57 被阅读0次

    With neural networks, we are working with sets of matrices:

    In order to use optimizing functions such as "fminunc()", we will want to "unroll" all the elements and put them into one long vector:

    If the dimensions of Theta1 is 10x11, Theta2 is 10x11 and Theta3 is 1x11, then we can get back our original matrices from the "unrolled" versions as follows:

    To summarize:

    来源:coursera 斯坦福 吴恩达 机器学习

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