gini {edgeR} | R 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)

[Package edgeR version 3.28.1 Index]