Subset tracks

subset_track() is a function that subsets tracks from a list of track data based on the specified indices.

Usage

subset_track(data, tracks = NULL)

Arguments

data

A track R object, which is a list consisting of two elements:

• Trajectories: A list of interpolated trajectories, where each trajectory is a series of midpoints between consecutive footprints.

• Footprints: A list of data frames containing footprint coordinates, metadata (e.g., image reference, ID), and a marker indicating whether the footprint is actual or inferred.

tracks

A numeric vector specifying the indices of tracks to subset. The default is to include all tracks.

Value

A track R object that contains only the specified subset of tracks. The structure of the returned object mirrors the input structure but includes only the selected tracks.

Details

This function subsets both the Trajectories and Footprints elements of the input data based on the provided vector of indices. It allows users to focus on a specific subset of tracks for further analysis or visualization, particularly when working with large datasets containing numerous tracks.

Logo

See also

tps_to_track

Author

Humberto G. Ferrón

humberto.ferron@uv.es

Macroevolution and Functional Morphology Research Group (www.macrofun.es)

Cavanilles Institute of Biodiversity and Evolutionary Biology

Calle Catedrático José Beltrán Martínez, nº 2

46980 Paterna - Valencia - Spain

Phone: +34 (9635) 44477

Examples

# Example 1: Subset the first three tracks of MountTom dataset.
subset_data <- subset_track(MountTom, tracks = c(1:3))

# Example 2:  Subset the tracks at indices 5, 7, and 10.
subset_data <- subset_track(MountTom, tracks = c(5, 7, 10))