| check_interval | Check if a given interval is a sudden gain/loss |
| count_intervals | Count number of between-session intervals available to identify sudden gains |
| create_byperson | Create a data set with one gain per person |
| create_bysg | Create a data set with one row for each sudden gain/loss |
| define_crit1_cutoff | Define cut-off value for first SG criterion |
| describe_sg | Show descriptives for the sudden gains datasets |
| extract_values | Extract values around the sudden gain |
| identify_sg | Identify sudden gains. |
| identify_sl | Identify sudden losses. |
| plot_sg | Plot average change in variables around the sudden gain |
| plot_sg_intervals | Plot summary of available data per time point and analysed session to session intervals |
| plot_sg_trajectories | Plot individual trajectories |
| rename_sg_vars | Rename variable names to a generic and consistent format |
| select_cases | Select sample providing enough data to identify sudden gains |
| sgdata | Longitudinal dataset with repeated measures of depression and rumination |
| sgdata_bad | Longitudinal dataset with repeated measures of depression and rumination (bad variable names) |
| write_byperson | Write a sudden gains data frame (bysg) to CSV, SPSS, STATA or Excel files |
| write_bysg | Write a sudden gains data frame (bysg) to CSV, SPSS, STATA or Excel files |