gini: Gini dispersion index

View source: R/gini.R

giniR Documentation

Gini dispersion index

Description

Gini index for each column of a matrix.

Usage

gini(x)

Arguments

x

a non-negative numeric matrix, or an object that can be coerced to such a matrix by as.matrix.

Details

The Gini coefficient or index is a measure of inequality or diversity. It is zero if all the values of x are equal. It reaches a maximum value of 1/nrow(x) when all values are zero except for one.

The Gini index is only interpretable for non-negative quantities. It is not meaningful if x contains negative values.

Value

Numeric vector of length ncol(x).

Author(s)

Gordon Smyth

References

https://en.wikipedia.org/wiki/Gini_coefficient.

Examples

x <- matrix(rpois(20,lambda=5),10,2)
gini(x)

OliverVoogd/edgeR documentation built on July 28, 2022, 10:13 p.m.