Flags locations that imply SDR exceeding a threshold
flag_fast_steps(x, delta, time_unit = "secs", ...)# S3 method for track_xyt
flag_fast_steps(x, delta, time_unit = "secs", ...)
Returns x (a track_xyt) with a flagging column added
(x$fast_step_).
[track_xyt] A track_xyt object.
[numeric] The threshold SDR over which steps are flagged.
See details.
[character] Character string giving time unit. Should be
"secs", "mins", or "hours". See details.
Addtional arguments. None currently implemented.
Brian J. Smith, based on code by Johannes Signer and Tal Avgar
Locations are flagged if the SDR from the previous location to the
current location exceeds delta. Internally, flagged locations are dropped
from future consideration.
The time_unit should be the same time unit with which the SDR threshold
was calculated. SDR is typically calculated in m^2/s, so time_unit defaults
to "secs". The spatial unit is determined by the CRS, which should typically
be in meters.
flag_duplicates(), flag_roundtrips(),
flag_defunct_clusters()