add_users_data          Retrieve user information for everyone in an
                        edgelist
create_edgelist         Create an edgelist where senders and receivers
                        are defined by different types of Twitter
                        interactions
filter_by_tweet_type    Filter a Twitter dataset to only include
                        statuses of a particular type
get_char_tweet_ids      Get Twitter status ID numbers as character
                        strings
get_upstream_tweets     Collect upstream statuses and add to dataset
get_url_domain          Find the domain name of URLs, even shortened
                        URLs
lookup_many_tweets      Retrieve the fullest extent of metadata for
                        more than 90,000 statuses
process_tweets          Calculate additional information using status
                        metadata
pull_tweet_data         Retrieve the fullest extent of status metadata
                        available from the Twitter API
read_tags               Retrieve a TAGS archive of Twitter statuses and
                        bring into R
