| add_duration | Add time spent on a visit in seconds |
| add_next_visit | Add the next visit as a new column |
| add_panelist_data | Add panelist features to tracking data |
| add_previous_visit | Add the previous visit as a new column |
| add_referral | Add social media referrals as a new column |
| add_session | Add a session variable |
| add_title | Download and add the "title" of a URL |
| as.wt_dt | An S3 class, based on data.table, to store web tracking data |
| audience_incidence | Create incidence matrix for two-mode networks including audiences |
| audience_network | Create audience networks |
| bakshy | Bakshy Top500 Ideological alignment of 500 domains based on facebook data |
| classify_visits | Classify visits by matching to a list of classes |
| create_urldummy | Create an urldummy variable from a data.table object |
| deduplicate | Deduplicate visits |
| domain_list | Domain list classification of domains into news,portals, search, and social media |
| drop_query | Drop the query and fragment from URL |
| extract_domain | Extract the domain from URL |
| extract_host | Extract the host from URL |
| extract_path | Extract the path from URL |
| is.wt_dt | An S3 class, based on data.table, to store web tracking data |
| isolation_index | Isolation Index |
| news_types | News Types |
| print.wt_dt | Print web tracking data |
| summary.wt_dt | Summary function for web tracking data |
| sum_activity | Summarize activity per person |
| sum_durations | Summarize visit duration by person |
| sum_visits | Summarize number of visits by person |
| testdt_survey_l | Test survey |
| testdt_survey_w | Test survey |
| testdt_tracking | Test data |
| vars_exist | Check if columns are present |
| wt_dt | An S3 class, based on data.table, to store web tracking data |