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Table 1.

Descriptions of network metrics

Observed (OBS) Number of time steps a node (pixel) was active or observed 
Switching cost (SW) Number of community switches made by an individual (normalized by the number of time steps an individual was observed) 
Visiting cost (VIS) Number of visits made by an individual to another community (normalized by the number of time steps an individual was observed) 
Absence cost (ABS) Number of absences of an individual from a community (normalized by the number of time steps an individual was observed) 
Community stay (AS, MS) Average (maximum) number of consecutive time steps an individual stayed as a member of the same community over the time steps the individual was observed 
Homing (HOM) Fraction of individual’s current community comembers, at each time step, who were comembers in the previous time step (normalized by the number of time steps an individual was observed) 
Ave. group size (GS) Average size of the groups (number of members and absents but not visitors) of which an individual was a member 
Community time span (TS) Average span of the communities (the last time step minus the first time step of the community’s existence) with which an individual was affiliated (as a member or absent) 
Ave. community size (CS) Average size of the communities (number of members and absents, but not visitors) with which an individual was affiliated (as a member or absent) 
Observed (OBS) Number of time steps a node (pixel) was active or observed 
Switching cost (SW) Number of community switches made by an individual (normalized by the number of time steps an individual was observed) 
Visiting cost (VIS) Number of visits made by an individual to another community (normalized by the number of time steps an individual was observed) 
Absence cost (ABS) Number of absences of an individual from a community (normalized by the number of time steps an individual was observed) 
Community stay (AS, MS) Average (maximum) number of consecutive time steps an individual stayed as a member of the same community over the time steps the individual was observed 
Homing (HOM) Fraction of individual’s current community comembers, at each time step, who were comembers in the previous time step (normalized by the number of time steps an individual was observed) 
Ave. group size (GS) Average size of the groups (number of members and absents but not visitors) of which an individual was a member 
Community time span (TS) Average span of the communities (the last time step minus the first time step of the community’s existence) with which an individual was affiliated (as a member or absent) 
Ave. community size (CS) Average size of the communities (number of members and absents, but not visitors) with which an individual was affiliated (as a member or absent) 
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