track_distance_to {traipse} | R Documentation |
Track distance to location/s
Description
Calculate geodesic distance to a location or locations based on longitude, latitude (from) input vectors and longitude, latitude (to) input vectors. The unit of distance is metres. The to values may be a single value or individual to each from location.
Usage
track_distance_to(x, y, to_x, to_y)
Arguments
x |
longitude |
y |
latitude |
to_x |
longitude vector of to location/s |
to_y |
latitude vector of to locations/s |
Details
No missing values are required as padding, but input data with NA
s will incur an
NA
in the output.
To use this on multiple track ids, use a grouped data frame with tidyverse code like
data %>% group_by(id) %>% mutate(distance = track_distance_to(lon, lat, to_lon, to_lat))
Value
a numeric vector of distance-to values in metres
Examples
track_distance_to(trips0$x, trips0$y, to_x = 147, to_y = -42)[1:10]
[Package traipse version 0.3.0 Index]