Python: 如何做矩陣乘法? numpy.matmul (ary1, ary2) 或 ary1 @ ary2 或 numpy.dot (ary1, ary2)
numpy.matmul (ary1, ary2): import ...
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numpy.matmul (ary1, ary2): import ...
lambda 匿名函式: lambda 函式必要時可以綁定一個名字:...
MSE(mean_squared_error): fr...
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