Working with Web Data in R 学习笔记

• Working with Web Data in R

• 4 hours

• 16 Videos

• 56 Exercises

• 3,042 Participants

Charlotte Wickham | DataCamp 他老姐在教。

• Introduction: Working With Web Data in R | R

• Downloading files and using specialised packages to get data from web

• httr package to query APIs using GET() and POST()

• JSON and XML ¹: data formats commonly returned

• CSS ² to navigate and extract data from webpages

• Saving raw files to disk | R

download.file()可以防止每次链接网络，好累。

csv_url <- "http://s3.amazonaws.com/assets.datacamp.com/production/course_1561/datasets/chickwts.csv"
# Download the file with download.file()
download.file(url = csv_url, destfile = "feed_data.csv")

# Read it in with read.csv()
csv_data <- read.csv("feed_data.csv")

• Saving formatted files to disk | R