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原创机器学习笔记

有监督学习与无监督学习有目标变量的研究，称为有监督学习，常用于预测未来。无目标变量的研究，称为无监督学习，常用于描述现在。根据具体问题和算法不同，常常分为以下六小类： - 分类 Classification(有监督学习) - 回归 Regression(有监督学习) - 异常检测 Deviation Detection(有监督学习) - 聚类 Clustering(无监督学习)

2017-01-16 10:46:13 5898

原创 selenium的安装及使用介绍

R爬虫之上市公司公告批量下载selenium的安装及使用介绍http://yphuang.github.io/blog/2016/03/01/Get-Listed-Company-Announcement/

2016-11-05 21:01:34 736

原创文章标题

PS: The data（stroopdata.csv）is provided by the course.1.**Independent variable：**The type of test,”the congruent words condition” and ” the incongruent words condition”.**Dependent variable:**The

2016-07-27 22:13:31 504

原创统计学笔记

统计量r2=t2t2+dfr^2=\frac{t^2}{t^2+df} t检验对H0H_{0}的解释度T-testT -test AssumptionsX and Y should be random samples from two independent populations.Populations are approximately normal.Sample

2016-07-25 15:02:00 972

原创 R语言笔记六

去除NA值方案一ggplot(aes(x=friend_count), data=subset(pf, !is.na(gender)))+ geom_histogram()+ scale_x_continuous(limits = c(0,1000), breaks = seq(0,1000,50))+ facet_wrap(~gender

2016-07-10 22:45:45 2405

原创 R语言笔记五

DebuggingDiagnosing the problemSomething’s Wrong! Indications that something’s not right.message: A generic notification/diagnostic message produced by the message function; execution of the functio

2016-07-04 15:34:18 10266

原创 R语言笔记二(控制结构)

paste(“hello”, “world”, sep = ” “)

2016-06-21 22:18:34 9541

原创 R语言笔记一

r语言

2016-06-19 21:44:10 12651

原创 R语言笔记四

str function str: Compacktly display the internal structure of an R object - A diagnostic function and an alternative to "summary" - It is especially well suited to compactly display the (abbrevia

2016-06-15 23:18:39 1826

原创 R Programming Assignment 1

Assignment: Air Pollution

2016-06-11 12:55:06 2858 1

原创 Define your own binary operators

Define your own binary operators# The syntax for creating new binary operators in R is unlike anything else in# R, but it allows you to define a new syntax for your function. I would only# recom

2016-06-11 11:41:29 733

转载 R语言中的数学计算（转载）

R语言中的数学计算关于作者：张丹(Conan), 程序员Java,R,PHP,Javascript weibo：@Conan_Z blog: http://blog.fens.me email: [email protected] 转载请注明出处： http://blog.fens.me/r-mathematics/r-math前言R是作为统计语言，生来就对数学有良好的支持，一个函数就能

2016-06-07 23:04:34 31119 2

原创 R语言笔记三（循环控制）

R语言笔记二Looping on the Command Linelapply: Loop over a list and evaluate a function on each elementsapply: Same as lapply but try to simplify the resultapply: Apply a function over the margins

2016-05-30 14:53:13 2039

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