richness: Richness or number of observed species

richnessR 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:

  • Equivalent to observed_otus() in skbio.diversity.alpha.

  • Equivalent to specnumber in vegan.

  • Equivalent to the sobs calculator in Mothur.

Value

The number of species observed, R \geq 0.

Examples

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

kylebittinger/abdiv documentation built on Nov. 22, 2023, 8:16 p.m.