NGÔN NGỮ LẬP TRÌNH R

 Tại sao là ngôn ngữ lập trình R?

- Free

- OS adaptability

- Many analysis methods

- Many "advanced" methods

- Great charts

History:

- R is a statistical and graphical programming language.

- Original is S 

+ 1988-S2: RA Becker, JM Chambers, A Wilks

+ 1992-S3: JM Chambers, TJ Hastie

+ 1998-S4: JM Chambers 

- R: thoạt đầu do Ross Ihaka và Robert Gentlemen (Đại học Auckland, New Zealand) viết vào thập niên 1990s. 

- Từ 1994, international "R-core", 15 người.

Pros and Cons:

- Pros:

+ Free

+ Many professional packages

+ Open source

- Cons:

+ Difficult to understand terms 

+ Use command

+ Symbol

What can R do?

- R is a statistical and analytical language 

- Can do "all" the statistics models 

- Simulation

- Draw chart & diagram beautifully

- Programming for new methods

Download from Internet:

- Availability internet connection 

- Access http://cran.r-project/

- R for Windows screen, choose "base"

- Choose Download R, run OK, install 

R workplace 

Dẫn nhập

- Assignment operator: <- or =

Object:

- Have a name 

- Ex: khoi.age = 15*3

khoi_age_1 <- 15*3

Case sensitive:

Workspace 

- getwd(): watch the present folder

- ls(): list working objects

- setwd(mydirectory): change working folder

Ex: setwd("DL/a/b/")

- savehistory(file="myfile"): save commands

- loadhistory(file="myfile"): load commands

Why shoud you use R programming language?

Packages:

- R have package structure

- Each methods for each package 

- Package will be download or onsite installing.

Thank you!

Source: Tram Vu Kiet