Table 1 Description of ORTEGA’s functions
Function | Description |
|---|---|
interaction_analysis() | Identifies spatiotemporal intersecting PPAs after the user specifies the short time window (for identifying concurrent interaction) or time interval (for delayed interaction) during the initialization step; computes the difference in speeds and movement directions for each intersecting PPA pair; and extracts continuously intersecting PPA segments (i.e., interaction events) if any exists |
compute_interaction_duration() | Computes the duration of each concurrent interaction event. This function only applies to concurrent interaction |
compute_ppa_perimeter() | Descriptive statistics of PPA ellipse’s perimeter for each moving individual |
compute_ppa_area() | Descriptive statistics of PPA ellipse’s area for each moving individual |
compute_ppa_interval() | Descriptive statistics of PPA time interval for each moving individual |
compute_ppa_speed() | Descriptive statistics of PPA speed for each moving individual |
attach_attributes() | Attaches attributes such as contextual variables to the dataframe of intersecting PPAs (derived from the function interaction_analysis()) for further correlation analysis |