min_ratio: MinRatio Size Overlap Ratio Metric

Description Usage Arguments Details Value References Examples

View source: R/metrics.R

Description

Function to calculate the minimum size ratio (larger/next larger) between species within an assemblage.

Usage

1
min_ratio(m = runif(20))

Arguments

m

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

Details

This index is based on the minimum size ratio (larger/next larger) difference between consecutively ordered species in an assemblage. It is appropriate for morphological traits, but not phenological ones.

Value

Returns the minimum size ratio 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

1
MinSizeDif <- min_ratio(rgamma(20,shape=3,scale=2))

EcoSimR documentation built on May 29, 2017, 9:11 p.m.

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