min_diff: MinDiff Size Overlap Metric

In EcoSimR: Null Model Analysis for Ecological Data

Description

Function to calculate the minimum absolute size difference between species within an assemblage.

Usage

min_diff(m = runif(20))

Arguments

m	a vector of non-negative trait measures, one for each species

Details

Although this index is typically used to examine body size differences in an animal assemblage, it could be used for any morphological index, such as beak size, or for a phenological "trait", such as peak flowering time in a plant assemblage.

Value

Returns the minimum difference between adjacent, ordered values.

References

Simberloff, D. and W.J. Boecklen. 1981. Santa Rosalia reconsidered: size ratios and competition. Evolution 35: 1206-1228.

Examples

MinSizeDif <- min_diff(rgamma(20,shape=3,scale=2))

Example output

Loading required package: MASS

EcoSimR documentation built on May 2, 2019, 7:26 a.m.