ivlev_electivity {electivity}

Ivlev's electivity, E

Description

Bounded between -1.0 (avoidance), 0 (random feeding), and +1.0 (preference).

Usage

ivlev_electivity(r, p)

Arguments

r

(Numeric) Resource utilisation.

p

(Numeric) Resource availability.

Value

A numeric vector.

Source

Lechowicz, M.J., 1982. The sampling characteristics of electivity indices. Oecologia 52, 22–30. https://doi.org/10.1007/BF00349007

Examples

data(moth_distrib)
ivlev_electivity(moth_distrib$r, moth_distrib$p)