Defines functions GTT

Documented in GTT

GTT <- function (x) {
# calculate two-partiness (Gains & Taagepera T)
# input: vector of vote share, ordered by party strength
# input validation: are percentages provided?
s <- sum(x)
if (s>1) {x <- x/100
warning("Sum of the vector provided is greater than 1: Values were divided by 100, assuming percentages were provided. Check your input.")
# two-partiness:
P1 <- x[1]
P2 <- x[2]
P3 <- x[3]

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polrep documentation built on Feb. 24, 2018, 3:01 a.m.