gmd | R Documentation |
gmd()
computes Gini's mean difference for a numeric vector
or for all numeric vectors in a data frame.
gmd(x, ...)
x |
A vector or data frame. |
... |
Optional, unquoted names of variables that should be selected for
further processing. Required, if |
For numeric vectors, Gini's mean difference. For non-numeric vectors
or vectors of length < 2, returns NA
.
Gini's mean difference is defined as the mean absolute difference between
any two distinct elements of a vector. Missing values from x
are
silently removed.
David HA. Gini's mean difference rediscovered. Biometrika 1968(55): 573-575
data(efc) gmd(efc$e17age) gmd(efc, e17age, c160age, c12hour)
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