Repair putative clusters by trimming track tails

Removes leading and trailing "tail" portions of each .putative_cluster based on self-crossings of the within-cluster track. The intent is to keep only the locally revisited core of a cluster and drop commuting legs at the both beginning and end.

Usage

tail_repair(ctdf)

Arguments

ctdf

A ctdf object.

Value

The input ctdf, invisibly, with .putative_cluster updated in-place.

Details

If the track has any self-crossing steps, the kept "core" is defined as the contiguous block of steps between the first and last crossing; all points outside this block are set to NA in .putative_cluster.