Update grad.py #43

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HubYZ wants to merge 1 commit into snowkylin:master from HubYZ:patch-1

HubYZ commented Feb 7, 2020

14行与原文公式（L(w, b) = |Xw + b - y|^2 ）不符


          Update grad.py

cbe551f

14行与原文公式（L(w, b) = \|Xw + b - y\|^2 ）不符

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HubYZ commented Feb 7, 2020

其次，2范数这些写并不规范，应该加上下标2.

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