From 156494d38c24433bc3f50aea2548b90975633c87 Mon Sep 17 00:00:00 2001 From: Sm1les Date: Thu, 4 Apr 2019 16:38:49 +0800 Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E4=B8=BB=E8=A6=81=E8=B4=A1?= =?UTF-8?q?=E7=8C=AE=E8=80=85=E5=90=8D=E5=8D=95+=E4=BF=AE=E6=AD=A3?= =?UTF-8?q?=E5=85=AC=E5=BC=8F3.7?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- README.md | 15 ++++++++++++++- docs/README.md | 15 ++++++++++++++- docs/chapter3/chapter3.md | 4 ++-- 3 files changed, 30 insertions(+), 4 deletions(-) diff --git a/README.md b/README.md index 39527be..4b537d9 100644 --- a/README.md +++ b/README.md @@ -68,7 +68,20 @@ $$（公式的LaTeX表达式）$$ ``` 样例参见`docs/chapter2/chapter2.md`和`docs/chapter3/chapter3.md` -## 关注我们 +# 主要贡献者（按首字母排名） +[@awyd234](https://github.com/awyd234) +[@Heitao5200](https://github.com/Heitao5200) +[@juxiao](https://github.com/juxiao) +[@LongJH](https://github.com/LongJH) +[@LilRachel](https://github.com/LilRachel) +[@Majingmin](https://github.com/Majingmin) +[@spareribs](https://github.com/spareribs) +[@sunchaothu](https://github.com/sunchaothu) +[@StevenLzq](https://github.com/StevenLzq) +[@Sm1les](https://github.com/Sm1les) +[@Ye980226](https://github.com/Ye980226) + +# 关注我们
diff --git a/docs/README.md b/docs/README.md index 6a1dce1..53a1dbc 100644 --- a/docs/README.md +++ b/docs/README.md @@ -13,7 +13,20 @@ > 版次：2016年1月第1版
> 勘误表：http://cs.nju.edu.cn/zhouzh/zhouzh.files/publication/MLbook2016.htm -## 关注我们 +# 主要贡献者（按首字母排名） +[@awyd234](https://github.com/awyd234) +[@Heitao5200](https://github.com/Heitao5200) +[@juxiao](https://github.com/juxiao) +[@LongJH](https://github.com/LongJH) +[@LilRachel](https://github.com/LilRachel) +[@Majingmin](https://github.com/Majingmin) +[@spareribs](https://github.com/spareribs) +[@sunchaothu](https://github.com/sunchaothu) +[@StevenLzq](https://github.com/StevenLzq) +[@Sm1les](https://github.com/Sm1les) +[@Ye980226](https://github.com/Ye980226) + +# 关注我们
diff --git a/docs/chapter3/chapter3.md b/docs/chapter3/chapter3.md index a6f6631..f1005cf 100644 --- a/docs/chapter3/chapter3.md +++ b/docs/chapter3/chapter3.md @@ -31,8 +31,8 @@ $$ & = \cfrac{\sum_{i=1}^{m}(x_i-\bar{x})(y_i-\bar{y})}{\sum_{i=1}^{m}(x_i-\bar{x})^2} \end{aligned} $$ -若令$ \mathbf{X}=(x_1,x_2,...,x_m) $，$\mathbf{X}_{demean}$为去均值后的$ \mathbf{X} $，$ \mathbf{y}=(y_1,y_2,...,y_m) $，$ \mathbf{y}_{demean} $为去均值后的$ \mathbf{y} $，其中$ \mathbf{X} $、$ \mathbf{X}_{demean} $、$ \mathbf{y} $、$ \mathbf{y}_{demean} $均为m行1列的列向量，代入上式可得： -$$ w=\cfrac{\mathbf{X}_{demean}\mathbf{y}_{demean}^T}{\mathbf{X}_{demean}\mathbf{X}_{demean}^T}$$ +若令$ \boldsymbol{x}=(x_1,x_2,...,x_m) $，$ \boldsymbol{x}_{d} $为去均值后的$ \boldsymbol{x} $，$ \boldsymbol{y}=(y_1,y_2,...,y_m) $，$ \boldsymbol{y}_{d} $为去均值后的$ \boldsymbol{y} $，其中$ \boldsymbol{x} $、$ \boldsymbol{x}_{d} $、$ \boldsymbol{y} $、$ \boldsymbol{y}_{d} $均为m行1列的列向量，代入上式可得： +$$ w=\cfrac{\boldsymbol{y}_{d}^T\boldsymbol{x}_{d}}{\boldsymbol{x}_d^T\boldsymbol{x}_{d}}$$ ## 3.10 $$ \cfrac{\partial E_{\hat{w}}}{\partial \hat{w}}=2\mathbf{X}^T(\mathbf{X}\hat{w}-\mathbf{y}) $$