Gini coefficient of a count vector

Mean-absolute-difference form \(\sum_i\sum_j |x_i - x_j| / (2 n^2 \bar x)\).

Usage

morie_concentration_gini(x)

Arguments

x

Non-negative counts; at least one positive.

Value

The Gini coefficient in [0, 1).

Examples

morie_concentration_gini(c(0, 0, 0, 1, 9))
#> [1] 0.76