The SIBER method for calculating Convex Hull based metrics of niche width
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.
siber.hull.metrics(X,Y,G,R=10^4)
X |
Data for the x-axis. |
Y |
Data for the y-axis. |
G |
A grouping variable |
R |
The number of posterior draws to make |
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. |
Andrew Jackson
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