【动手学习pytorch笔记】4.处理过拟合之——L2正则化（权重衰减）

L2正则化

%matplotlib inline
import torch
from torch import nn
from d2l import torch as d2l

生成数据

y=0.05+∑i=1d0.01xi+ϵ  where ϵ∼N(0,0.012) y = 0.05 + \sum_{i=1}^{d}{0.01x_i} + \epsilon \;where \ \epsilon \sim N(0,0.01^2) y=0.05+i=1∑d​0.01xi​+ϵwhere ϵ∼N(0,0.01