Comments (1)
都没大错,如果非要说有小瑕疵的话,那就是第一处的z如果写成z’可能会歧义更小,因为一般来说,向量都是列向量而不是行向量。至于大写的X和Z作为矩阵,是由这些向量转置成行后堆叠起来的,即X'=(x_1, x_2, \dots, x_n), Z'=(z_1, z_2, \dots, z_n)。所以W'X'=(W'x_1,W'x_2,\dots, W'x_n)=(z_1, z_2, \dots, z_n)=Z',即Z=XW
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Related Issues (20)
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