Web scraping with 'rvest'

##Web Scraping
install.packages("rvest")
library(rvest)
library(dplyr)
packageDescription("rvest")
##Authored and maintained by Hadley Wickham
#must download 'selector grdget plug un for chrome "http://selectorgadget.com/"

##I want to scrape google news for key words
#https://news.google.com/news/?ned=us&gl=US&hl=en

#Create item
google<-html("https://news.google.com/news/?ned=us&gl=US&hl=en")
##^this tells 'R' to go scrape the entire google news website and pull the html code in
#Go to website and paste code from selector gadget into quotes 
google %>%
  html_nodes(".kzAuJ") %>%
  html_text()

##Another example...weather
weather<-html("http://forecast.weather.gov/MapClick.php?lat=43.60761000000008&lon=-116.19339999999994#.WntDtainGUk")
weather %>%
  html_nodes("#detailed-forecast-body b , .forecast-text") %>%
  html_text()
##Last one, cheapest biology degrees
cheapbio<-html("https://www.bestvalueschools.com/rankings/small-colleges-biology-degree/")
cheapbio %>%
  html_nodes("h3") %>%
  html_text()