Calculate the Gini index of a numeric vector.

## Arguments

## Value

A numeric value between 0 and 1.

## Details

The Gini index (Gini coefficient) is a measure of statistical dispersion. A Gini
coefficient of zero expresses perfect equality where all values are
the same. A Gini coefficient of one expresses maximal inequality among values.

## References

Gini. C. (1912) *Variability and Mutability*, C. Cuppini, Bologna
156 pages.

## Author

Jitao David Zhang <jitao_david.zhang@roche.com>

## Examples

```
testValues <- runif(100)
gini(testValues)
#> [1] 0.32505
```