siar: siber.ellipses – R documentation

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siber.ellipses

The SIBER method for calculating ellipse based metrics of niche width

Takes bivariate isotope data in x and y with a grouping variable and returns the posterior draws for the metric SEA.B for each group.

siber.ellipses(x,y,group,R=10^4)

`x`	Data for the x-axis.
`y`	Data for the y-axis.
`group`	A grouping variable
`R`	The number of posterior draws to make

SEA.B

A matrix containing the posterior estimate of the Standard Ellipse Area metric for each group by column.

Andrew Jackson

Stable Isotope Analysis in R

v4.2

GPL (>= 2)

Authors

Andrew Parnell and Andrew Jackson

Initial release

2013-4-23