R Programming Language Basics

• Set working directory

> setwd('~/Desktop/R_scripts')

• Read data

> data=read.table('Statistic.csv')

# Need two backslashes for Windows file system
> data=read.table('C:\Documents\My R\Life Expentancy.txt')
Error: '\U' used without hex digits in character string starting "'C:\U"

> data=read.table('C:\\Documents\\My R\\Life Expectancy.txt')

• Review data

> data
1    A    2.0
2    B    3.0
3    C    4.0

• Assign a specific column to variable

> grade=data[,2]

• Plotting

> plot(grade, xlab='Name', ylab='Score', ylim=c(1,3)
> boxplot(grade, xlab='Name', ylab='Score', ylim=c(1,3)

• View basic arithmetic summary data

> summary
Min.