chao1 {breakaway}

Chao1 species richness estimator

Description

This function implements the Chao1 richness estimate, which is often mistakenly referred to as an index.

Usage

chao1(input_data, output = NULL, answers = NULL)

Arguments

input_data

An input type that can be processed by convert() or a phyloseq object

output

Deprecated; only for backwards compatibility

answers

Deprecated; only for backwards compatibility

Value

An object of class alpha_estimate, or alpha_estimates for phyloseq objects

Note

The authors of this package strongly discourage the use of this estimator. It is only valid when you wish to assume that every taxa has equal probability of being observed. You don't really think that's possible, do you?

Author(s)

Amy Willis

Examples

chao1(apples)