Skip to contents

Measure the distance between pairs of consecutive events within each track

Source: R/event_distance.R
event_distance.Rd

This function returns the distance of each segment between events for each track. In order to return a vector with the same number of rows as the event table, the distance of the last event is set to NA.

Usage

event_distance(x, units = as_units("m"))

Arguments

x

A move2 object.

units

Optional, the units to use for the distance. The default is "m". Other distance units supported by the units package can also be supplied.

Value

A vector of distances of the same length as the number of events in x, with the last value set to NA for each track.

Details

For unprojected longitudes and latitudes, the distance is computed as the geodesic distance (via the geodist package); for projected coordinates, the Euclidean distance is used.

Examples

event_distance(example_tt)
#> Units: [m]
#>  [1] 397765.28 217487.80 165926.30 389327.19        NA 114504.81 252404.85
#>  [8] 349367.79 154339.99        NA 370108.91  36614.31  67549.89 338384.25
#> [15]        NA
event_distance(example_tt, units = as_units("km"))
#> Units: [km]
#>  [1] 397.76528 217.48780 165.92630 389.32719        NA 114.50481 252.40485
#>  [8] 349.36779 154.33999        NA 370.10891  36.61431  67.54989 338.38425
#> [15]        NA