summary和loadings

R与数据分析旧笔记（十七）主成分分析

主成分分析主成分分析 Pearson于1901年提出的,再由Hotelling(1933)加以发展的一种多变量统计方法通过析取主成分显出最大的个别差异,也用来削减回归分析和聚类分析中变量的数目可以使用样本协方差矩阵或相关系数矩阵作为出发点进行分析成分的保留:Kaiser主张(1960)将特征值小于1的成分放弃,只保留特征值大于1的成分如果能用不超过3-5个成分就能解释变异的80%,就算是成功通过对原是变量进行线性组合,得到优化的指标把原先多个指标的计算降维为少量几个经过优化指标的计

R语言基础

一.扩展包的基本操作语句R安装好之后,默认自带了"stats" "graphics" "grDevices" "utils" "datasets" "methods" "base"这七个包,这七个包是不允许被卸载和删除的.1.扩展包的安装install.packages("扩展包名称") 也可以在手动安装,所有的安装包都可以在网站https:/

R语言学习之主成分分析法的R实践

主成分分析R软件实现程序(一): >d=read.table("clipboard",header=T) #从剪贴板读取数据 >sd=scale(d) #对数据进行标准化处理 >sd #输出标准化后的数据和属性信息,把标准化的数据拷贝到剪贴板备用 >d=read.table("clipboard",header=T) #从剪贴板读取标准化数据 >pca=princomp(d,cor=T) #主成分分析函数 >screepl

主成分分析 R语言

主成分分析(Principal Component Analysis,PCA), 是一种统计方法.通过正交变换将一组可能存在相关性的变量转换为一组线性不相关的变量,转换后的这组变量叫主成分. 原理: 在用统计分析方法研究多变量的课题时,变量个数太多就会增加课题的复杂性.人们自然希望变量个数较少而得到的信息较多.在很多情形,变量之间是有一定的相关关系的,当两个变量之间有一定相关关系时,可以解释为这两个变量反映此课题的信息有一定的重叠.主成分分析是对于原先提出的所有变量,将重复的变量(关系紧密的变量

Summary of Critical and Exploitable iOS Vulnerabilities in 2016

Summary of Critical and Exploitable iOS Vulnerabilities in 2016 Author:Min (Spark) Zheng, Cererdlong, Eakerqiu @ Team OverSky 0x00 Introduction iOS security is far more fragile than you believe. And there are lots of critical and exploitable iOS vuln

三个不常用的HTML元素：<details>、<summary>、<dialog>

前面的话 HTML5不仅新增了语义型区块级元素及表单类元素,也新增了一些其他的功能性元素,这些元素由于浏览器支持等各种原因,并没有被广泛使用文档描述 <details>主要用于描述文档或文档某个部分的细节,与<summary>配合使用可以为<details>定义标题.标题是可见的,用户点击标题时,显示出details [注意]这两个标签只有chrome和opera支持 <details> 该标签仅有一个open属性,用来定义details是否可见(默认为不

[LeetCode] Summary Ranges 总结区间

Given a sorted integer array without duplicates, return the summary of its ranges. For example, given [0,1,2,4,5,7], return ["0->2","4->5","7"]. Credits:Special thanks to @jianchao.li.fighter for adding this problem and

Network Basic Commands Summary

Network Basic Commands Summary set or modify hostname a) temporary ways hostname NEW_HOSTNAME, but if you reboot your system, it will disabled. b) permanent ways: edit "/etc/sysconfig/network" HOSTNAME, then restart system, it will effect

Summary - SNMP Tutorial

30.13 Summary Network management protocols allow a manager to monitor and control routers and hosts. A network management client program executing on the manager's workstation contacts one or more servers, called agents, running on the devices to be

Mac Brew Install Nginx Summary

==> Downloading https://homebrew.bintray.com/bottles/nginx-1.10.1.el_capitan.bot######################################################################## 100.0%==> Pouring nginx-1.10.1.el_capitan.bottle.tar.gz==> CaveatsDocroot is: /usr/local/var/

Leetcode: LFU Cache && Summary of various Sets: HashSet, TreeSet, LinkedHashSet

Design and implement a data structure for Least Frequently Used (LFU) cache. It should support the following operations: get and set. get(key) - Get the value (will always be positive) of the key if the key exists in the cache, otherwise return -1. s

How to add taxonomy element to a summary view?

[re: Orchard CMS] This caused me scratching my head for days and now I can even feel it's bleeding. The answer however is the simplest. Because it's not obviously indicated anywhere, I was anticipating the layout only works for the detail view of A c

(转) Summary of NIPS 2016

转自:http://blog.evjang.com/2017/01/nips2016.html Eric Jang Technology, A.I., Careers Monday, January 2, 2017 Summary of NIPS 2016 The 30th annual Neural Information Processing Systems (NIPS) conference took place in Barcelona

leetcode-【中等题】228. Summary Ranges

题目: 228. Summary Ranges Given a sorted integer array without duplicates, return the summary of its ranges. For example, given [0,1,2,4,5,7], return ["0->2","4->5","7"]. 答案: 就是找连续的序列. 直接判断相邻数据大小是否相差为1即可,主要是注意最后的数字要特殊考虑一下

ECLIPSE ANDROID PROJECT IMPORT SUMMARY

ECLIPSE ANDROID PROJECT IMPORT SUMMARY======================================Manifest Merging:-----------------Your project uses libraries that provide manifests, and your Eclipseproject did not explicitly turn on manifest merging. In Android Gradlepr

Java for LeetCode 228 Summary Ranges

Given a sorted integer array without duplicates, return the summary of its ranges. For example, given [0,1,2,4,5,7], return ["0->2","4->5","7"]. 解题思路: JAVA实现如下: public List<String> summaryRanges(int[] nums) { List

summary of k Sum problem and solutions in leetcode

I found summary of k Sum problem and solutions in leetcode on the Internet. http://www.sigmainfy.com/blog/summary-of-ksum-problems.html

details和summary

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>details</title> </head> <body> <details> <summary>html5视频教程</summary> <p>CSS 我们可以大大提升网页开发的工作效

HBase with MapReduce （Summary）

我们知道,hbase没有像关系型的数据库拥有强大的查询功能和统计功能,本文实现了如何利用mapreduce来统计hbase中单元值出现的个数,并将结果携带目标的表中, (1)mapper的实现 package com.datacenter.HbaseMapReduce.Summary; import java.io.IOException; import java.util.NavigableMap; import java.util.Map.Entry; import org.apache.h

Principal Component Analysis(PCA) algorithm summary

Principal Component Analysis(PCA) algorithm summary mean normalization(ensure every feature has sero mean) Sigma = 1/m∑(xi)(xi)T [U,S,V] = svd(Sigma) ureduce = u(:,1:K) Z = ureduce ' * X Pick smallest value of k for which ∑ki=1 Sii / ∑i=mi=1 Sii >

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