Tải dữ liệu từ internet trong R

Trong R có các cách sau để tải dữ liệu từ nguồn internet về dùng:

1. Dùng download.file()

temporaryFile <- tempfile()
download.file("https://raw.githubusercontent.com/vincentarelbundock/Rdatasets/master/csv/datasets/AirPassengers.csv", destfile=temporaryFile)

trying URL 'https://raw.githubusercontent.com/vincentarelbundock/Rdatasets/master/csv/datasets/AirPassengers.csv'
Content type 'text/plain; charset=utf-8' length 3326 bytes
downloaded 3326 bytes

myData <- read.csv(temporaryFile)
head(myData)

apply(myData, 2, class)

            X          time AirPassengers 
    "numeric"     "numeric"     "numeric" 

2. Dùng package RCurl

library(RCurl)
myCsv <- getURL("https://raw.githubusercontent.com/vincentarelbundock/Rdatasets/master/csv/datasets/Titanic.csv", ssl.verifypeer = FALSE)
myData <- read.csv(textConnection(myCsv))
dim(myData)

[1] 1313    7

apply(myData, 2, summary)

       X           Name        PClass      Age         Sex         Survived    SexCode    
Length "1313"      "1313"      "1313"      "1313"      "1313"      "1313"      "1313"     
Class  "character" "character" "character" "character" "character" "character" "character"
Mode   "character" "character" "character" "character" "character" "character" "character"

3. Chỉ dùng hàm cơ bản read.csv trong R

myData <- read.csv("https://raw.githubusercontent.com/vincentarelbundock/Rdatasets/master/csv/datasets/Titanic.csv", header=T)
head(myData)