make_loop: make loop
In dblodgett-cycling/gpxR: GPX R Tools for Fake Cycling

make loop

make_loop(
  track,
  start_id,
  end_id,
  lap_start = NULL,
  control = NULL,
  correct_elevation = FALSE
)

`track`	sf data.frame gpx track
`start_id`	numeric track_seg_point_id of start
`end_id`	numeric track_seg_point_id of end
`lap_start`	track_seg_point_id of desired start – NULL for no adjustment.
`control`	numeric c(lon, lat)
`correct_elevation`	logical should elevation of start be forced to match elevation of end?