richness {abdiv}R Documentation

Richness or number of observed species

Description

Richness or number of observed species

Usage

richness(x)

Arguments

x

A numeric vector of species counts or proportions.

Details

The richness is simply the number of nonzero elements in x. Relation to other definitions:

Value

The number of species observed, R ≥q 0.

Examples

x <- c(15, 6, 4, 0, 3, 0)
richness(x) # 4

[Package abdiv version 0.2.0 Index]