R Studio

Introduction

Below is something I think is basic but important to conduct data analysis on R studio. Besides, I would strongly recommend purchasing R in action, data analysis and graphics with R for learning. This book is the bibble in R language and helps me a lot.

Import Data from xlsx files

library():rJava,xlsx

library():openxlsx: to avoid Java memory overflow

book <-“file” (direct read)

book<-read.xlsx(file,sheet) (import into dataframe)

Data Type Change

• as.factor()

Explorary Data Analysis

• summary()

Data Visualization

library(ggplot2)

• plot()
• hist()

Modeling

• lm()
• glm()

Model Improvement

• AIC or BIC

 

(TBC)