siber.hull.metrics: The SIBER method for calculating Convex Hull based metrics of...

In AndrewLJackson/siar: Stable Isotope Analysis in R

Description

Takes bivariate isotope data in x and y with a grouping variable and returns a list that contains the posterior distribution of the 6 niche width metrics for application to community type data described by Layman, C.A., Arrington, D.A., Montana, C.G., & Post, D.M. (2007) Can stable isotope ratios provide for community-wide measures of trophic structure? Ecology, 88, 42-48.

Usage

siber.hull.metrics(X,Y,G,R=10^4)

Arguments

X	Data for the x-axis.
Y	Data for the y-axis.
G	A grouping variable
R	The number of posterior draws to make

Value

metrics

A Rx6 matrix containing the R posterior draws in rows, and the metrics in columns in the order: dNr, dCr, TA, CD, MNND, SDNND.

Author(s)

Andrew Jackson

AndrewLJackson/siar documentation built on May 5, 2019, 5:59 a.m.