getRSI

a rnage shift object, outputted by <code><a rd-options="" href="/link/estimate_shift?package=marcher&version=0.0-2" data-mini-rdoc="marcher::estimate_shift">estimate_shift</a></code>

the indices of the ranges to estimate from and to, i.e., for single shift, 1 and 2.  For three ranges (two shifts) it can be 1 and 2, 2 and 3, or 1 and 3 - if the ultimate shift is the one of interest.

nboot

The range shift index is a dimensionless measure of the distance of the centroids of two ranges divided by the diameter of the 95% area. This function uses the 95% confidence intervals from a range shift fit to calculate a point estimate and 95% confidence intervals of the RSI.

A set of tools for likelihood-based estimation, model selection and testing of two- and three-range shift and migration models for animal movement data as described in Gurarie et al. (2017) <doi: 10.1111/1365-2656.12674>.  Provided movement data (X, Y and Time), including irregularly sampled data, functions estimate the time, duration and location of one or two range shifts, as well as the ranging area and auto-correlation structure of the movment.  Tests assess, for example, whether the shift was "significant", and whether a two-shift migration was a true return migration.

Eliezer Gurarie

marcher

Migration and Range Change Estimation in R

Farid Cheraghi

getRSI function

a rnage shift object, outputted by <code><a rd-options='' href='estimate_shift'>estimate_shift</a></code>

getRSI: Compute Range Shift Index

Description

Usage

Arguments

Value