polarization {agrmt}

Calculate polarization

Description

Calculates polarization, based on measure of agreement A

Usage

polarization(V, old = FALSE)

Arguments

V

A frequency vector

old

Specify old=TRUE to use the deprecated algorithm for agreement A

Details

This function calculates polarization by re-scaling agreement A introduced by Cees van der Eijk. Whereas agreement A ranges from -1 to 1, polarization ranges from 0 to 1. If all observations are in the same category, polarization is 0. With half the observations in one category, and half the observations in a different (non-neighbouring) category, polarization is 1. Polarization is 0.5 for a uniform distribution over all categories.

Value

The function returns a polarization score

Author(s)

Didier Ruedin

See Also

agreement

Examples

V <- c(30,40,210,130,530,50,10)
# Calculate polarization
polarization(V)
# The rate of polarization is given as 0.1943333