A ctmm::as.telemetry() telemetry list hold mutiple animal data in separate
list items, each item have the animal location data in a data frame, and
other information in various slots. This structure supports flexible S3
methods for telemetry object. However to plot multiple animals location
together with ggplot2 we need to collect all location data as a single
data.frame with an animal id column.
collect(tele_obj_list)
| tele_obj_list |
|
|---|
list of - data_dt: all animals collected in one data.table -
info: animal information table
This function convert any input telemetry List into a list of 1. data.table
of location data, and 2. animal information data.table. data.table is
chosen over data.frame for much better performance. This data structure is
also used in a lot of places in app, which works on any selected subset of
full data in almost all steps.