<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[Eat_egg的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/Eat_egg</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; Eat_egg]]></copyright><item><title><![CDATA[种类并查集的万能公式]]></title><link>https://blog.youkuaiyun.com/Eat_egg/article/details/105171606</link><guid>https://blog.youkuaiyun.com/Eat_egg/article/details/105171606</guid><author>Eat_egg</author><pubDate>Fri, 03 Jul 2020 21:59:26 +0800</pubDate><description><![CDATA[举两个例子：
食物链题目链接
#include&lt;iostream&gt;
using namespace std;
const int N=1e5+10;
int f[N],d[N],n;

void init(){
    for(int i=0;i&lt;=n;i++){
        f[i]=i;
    }
}

int find(int x){
    if(x==f[x]) ...]]></description><category></category></item><item><title><![CDATA[吴恩达第8周编程作业]]></title><link>https://blog.youkuaiyun.com/Eat_egg/article/details/106951011</link><guid>https://blog.youkuaiyun.com/Eat_egg/article/details/106951011</guid><author>Eat_egg</author><pubDate>Wed, 24 Jun 2020 21:52:51 +0800</pubDate><description><![CDATA[Find Closest Centroids
min() 函数会返回两个值，第一个是value，第二个是index；（中文意思）

Compute Centroid Means
第一个for，遍历所有的data（X），把同为类的x加到对应centroids上，c 临时存放当前data X(i) 属于哪个类； +=  和 ./ = 你懂的
第二个for，你懂的；

PCA
注意  ./ 符号

Project Data

Recover Data (PCA)


...]]></description><category></category></item><item><title><![CDATA[Regularized linear regression]]></title><link>https://blog.youkuaiyun.com/Eat_egg/article/details/106524408</link><guid>https://blog.youkuaiyun.com/Eat_egg/article/details/106524408</guid><author>Eat_egg</author><pubDate>Thu, 11 Jun 2020 21:03:24 +0800</pubDate><description><![CDATA[cost function:

gradient:

外部初始化：
y = theta0 + theta1 * x1 + theta2 * x2 + theta3 * x3;
每一行是一个数据 样本， 这里有三个feature，两条数据(题目dataset太小，这个只是用于理解)
X :				 y:
x11 x12 x13 	 y1 
x21 x22 x23		 y2

m = size(X, 1);
theta = [1 ; 1];
J = linearRegCostFunction( [ones(m,]]></description><category></category></item><item><title><![CDATA[吴恩达机器学习 第六周实验代码]]></title><link>https://blog.youkuaiyun.com/Eat_egg/article/details/106696786</link><guid>https://blog.youkuaiyun.com/Eat_egg/article/details/106696786</guid><author>Eat_egg</author><pubDate>Thu, 11 Jun 2020 21:00:31 +0800</pubDate><description><![CDATA[1.linearRegCostFunction

2.learningCurve

3.polyFeatures
4.validationCurve


]]></description><category></category></item><item><title><![CDATA[C++stl备忘录]]></title><link>https://blog.youkuaiyun.com/Eat_egg/article/details/104988998</link><guid>https://blog.youkuaiyun.com/Eat_egg/article/details/104988998</guid><author>Eat_egg</author><pubDate>Fri, 20 Mar 2020 22:49:42 +0800</pubDate><description><![CDATA[dada]]></description><category></category></item></channel></rss>