twitteR is an R package which provides access to the Twitter API. Most functionality of the API is supported, with a bias towards API calls that are more useful in data analysis as opposed to daily interaction.
install.packages("twitteR") or use the github version. To do the latter:install.packages(c("devtools", "rjson", "bit64", "httr"))library(devtools)install_github("geoffjentry/twitteR")twitteR installed and can proceed:library(twitteR)setup_twitter_oauth("API key", "API secret")
API key and API secret are from the Twitter app page above. This will lead you through httr's OAuth authentication process. I recommend you look at the man page for Token in httr for an explanation of how it handles caching.