标签：distance off .com splay lin gre controls 梯度下降 images
1 Locally weighted linear regression
Here the w are non-nagative valued weights. 是一个contribute， A fairly standard choice for the weights is:
(不要与高斯混为一谈，这个函数积分不要求为1，可以是正无穷; 这个函数不是唯一地；最大值1，最小值0)
tau is bandwidth which controls how quickly the weight of a training example falls off with distance of the middle(x^(i))
Locally weighted linear regression is the first example we’re seeing of a non-parametric algorithm
2 未完待续...
标签：distance off .com splay lin gre controls 梯度下降 images
原文地址：http://www.cnblogs.com/hans209/p/6920711.html
