dupfilter_qi

A data frame containing columns with the following headers: "id", "DateTime", "qi". 
The function filters the input data by the unique "id". 
"DateTime" is date &amp; time in class <code><a rd-options="base" href="/link/POSIXct?package=SDLfilter&version=2.0.0&to=base" data-mini-rdoc="base::POSIXct">POSIXct</a></code>. 
"qi" is the numerical quality index associated with each location fix where a greater number indicates a higher accuracy 
(e.g. the number of GPS satellites involved in estimation).

sdata

Consecutive locations less than or equal to step.time apart are considered temporal duplicates.
Default is 0 hours.

step.time

Function to filter temporal duplicates in tracking data by quality index.

Functions to filter GPS and/or Argos locations, as well as assessing sample sizes for the analysis of animal distributions. The filters remove temporal and spatial duplicates, fixes located at a given height from estimated high tide line, and locations with high error as described in Shimada et al. (2012) <doi:10.3354/meps09747> and Shimada et al. (2016) <doi:10.1007/s00227-015-2771-0>. Sample sizes for the analysis of animal distributions can be assessed by the conventional area-based approach or the alternative probability-based approach as described in Shimada et al. (in prep).

Takahiro Shimada

SDLfilter

Filtering and Assessing Sample Size of Tracking Data

dupfilter_qi function

A data frame containing columns with the following headers: "id", "DateTime", "qi". 
The function filters the input data by the unique "id". 
"DateTime" is date &amp; time in class <code><a rd-options='base' href='POSIXct'>POSIXct</a></code>. 
"qi" is the numerical quality index associated with each location fix where a greater number indicates a higher accuracy 
(e.g. the number of GPS satellites involved in estimation).

dupfilter_qi: Filter temporal duplicates by quality index

Description

Usage

Arguments

Value

Details

References

See Also