Introduction to R language-installation and help for R

1. Acquisition and installation of R and Rstudio

-Acquisition and installation of R

A. https://cran.r-project.org/= R for Windows + base = Download R 3.3.2 for Windows

-Acquisition and installation of RStudio

A. Integrated development environment (IDE), user interface for R

B. https://www.rstudio.com/= Rstudio Download = Rstudio Desktop Open Source License = Installers:rstu Dio 1.0.136-windows VISTA/7/8/10

2. Packages (Package)

-Mechanisms for extending the basic functions of R/integration of many functions

-Get packages from Cran/bioconductor/github etc.

A. Install.packages ()

B. Install_github ()

-https://cran.r-project.org/= Left packages = Table of available packages

-Modify the Image:

RStudio = Tool = Global Options = Packages = CRAN Mirror = China (Beijing)

-Install caret Package: Install.packages ("caret")

-Import Caret Package: library (caret)

-Data (): Data sets in package ' caret '

- ? Insectsprays:insectsprays R Documentation

　　

3. How to Get Help

-On the command line, enter:? function names such as:? LM get help documentation for linear regression related R

-Google/stackoverflow

-How to ask questions:

A. Operating system, r version, which step produces errors, what is expected, what results are obtained, other information

B. For example: Win7 R 3.2.0 lm () "SEG fault on large data frame"

Introduction to R language-installation and help for R