Calculate Gini Index of a numeric vector

Calculate the Gini index of a numeric vector.

gini(x)

Arguments

x	A numeric vector.

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