telemetR (version 1.0)

filter_2h: Basic Two Hit Filter for Detections

Description

This function takes a detection dataframe generated from the add_org() function and filters it a second time to remove any remaining multipath detections, and then check the remaining detections by comparing the time between each detection to ensure it is less 4x the stated pulse rate interval. Called by second_filter_2h4h().

Usage

filter_2h(org_file, time_unit, multipath_time, org_ping_rate)

Value

A dataframe which has been filtered to remove false positives

Arguments

org_file

a dataframe of detections retrieved from add_org()

time_unit

The unit of time used for analyses (seconds, minutes, hours, days, weeks, months)

multipath_time

A numeric maximum amount of time which must pass between detections for a detection to be considered a "true", not a bounced, signal.

org_ping_rate

The expected time between transmissions emitted from tags/transmitters implanted or attached to an organism

Examples

# Apply a 2-hit filter to data previously prefiltered and with organism data
filter_2h(org_file = dat_orgfilt,
          time_unit = "secs",
          multipath_time = 0.3,
          org_ping_rate = 3)