RProbSup (version 3.0)

CalcIK1: CalcIK1

Description

Calculates the A statistic while singling out one group for two or more groups. Note: This function is not meant to be called by the user, but it is called by IK1.

Usage

CalcIK1(y, ref = 1, weights = FALSE)

Arguments

y

Matrix of cases (rows) by scores (column 1) and group codes (column 2) (matrix).

ref

Reference group (to compare to all others) (scalar, default = 1).

weights

Weight of each case. Set to TRUE to weight cases; if so, column 3 contains case weights (default = FALSE).

Value

a

The A statistic.

References

Ruscio (2008) & Ruscio and Mullen (2012) & Ruscio and Gera (2013)

Examples

# NOT RUN {
x1 <- rnorm(25)
x2 <- x1 - rnorm(25, mean = 1)
x3 <- x2 - rnorm(25, mean = 1)
y <- cbind(c(x1, x2, x3), c(rep(1, 25), rep(2, 25), rep(3, 25)))
CalcIK1(y)
# }