李宏毅深度學習筆記（二）隨機梯度下降(Stochastic Gradient Descent)

已知損失函數爲： L = ∑ j = 1 n ( y ^ j − ( b + ∑ i = 1 m w i x i j ) ) 2 L=\sum_{j=1}^n(\hat y^j-(b+\sum_{i=1}^{m}w_ix_i^j))^2 L=∑j=1n​(y^​j−(b+∑i=1m​wi​xij​))2·············································(1)

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