kequate (version 1.5.0)

getEqirt: Retrieve Equated Values From an IRT-Equating

Description

Function to retrieve the equated values of the IRT observed score equating from an object of class keout created by kequate.

Usage

getEqirt(object)

Arguments

object

An object of class keout as created by the function kequate.

Value

A vector containing the equated values of the IRT-equating.

See Also

kequate

Examples

irtmatX<-matrix(0, 4, 3)
irtmatX[,1]<-c(0.1, 0.3, 0.2, 0.5)
irtmatX[,2]<-c(0.2, 0.5, 0.4, 0.7)
irtmatX[,3]<-c(0.3, 0.7, 0.6, 0.9)
irtmatY<-matrix(0, 4, 3)
irtmatY[,1]<-c(0.15, 0.2, 0.1, 0.4)
irtmatY[,2]<-c(0.2, 0.4, 0.3, 0.6)
irtmatY[,3]<-c(0.25, 0.6, 0.5, 0.8)
irtX<-c(12, 32, 54, 22, 10)
irtY<-c(24, 36, 48, 12, 10)
xirt=0:4
glmXirt<-glm(irtX~xirt+I(xirt^2), family="poisson", x=TRUE)
glmYirt<-glm(irtY~xirt+I(xirt^2), family="poisson", x=TRUE)
keEGirt<-kequate("EG", 0:4, 0:4, glmXirt, glmYirt, irtx=irtmatX, irty=irtmatY)
getEqirt(keEGirt)