[Reading notes] R language Combat (i) Introduction to the R language

Typical data analysis steps:

R Language: Language and environment for statistical calculations and plotting

Data analysis: Statistics, machine learning

Use of R

1. Case-sensitive, interpreted language

2. R Statement Assignment: <-

3. R Comment: #

4. Create vector C ()

5. Watch Demo List demo (), Graphic demo demo (graphics)

6. Help function

7. GETWD () View current working directory, SETWD () set Current working directory

SETWD (' e:\\ ') GETWD () [1] "e:/"

8. Working space management functions

9. Input and output

1). Enter

Source (' filename ') executes a script in the current session

2). Text output

Sink (' filename ') output redirected to file filename, append=true append file

3). Graphics output

4). Dev.off () output back to Terminal

#在当前会话中执行脚本source ("script1. R ") #文本输出 [append] to Myoutput, the graphic output is saved to Mygraphs.pdfsink (" Myoutput ", Append=true, split= TRUE) in PDF (" Mygraphs.pdf ") Source (" Script2. R ") #sink () #结果返回到终端dev. Off () source (" Script3. R ")

10. Package Management

#安装ggplot2包install. Packages ("Ggplot2") #更新ggplot2包update. Packages ("Ggplot2") #载入包library (Ggplot2) #查看已加载包 (. Packages ()) #卸除包detach ("Package:ggplot2") #卸载包remove. Packages ("Ggplot2")

　　

　　

[Reading notes] R language Combat (i) Introduction to the R language