Gini dispersion index
Gini index for each column of a matrix.
gini(x)
x |
a non-negative numeric matrix, or an object that can be coerced to such a matrix by |
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.
Numeric vector of length ncol(x).
Gordon Smyth
x <- matrix(rpois(20,lambda=5),10,2) gini(x)
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