ikcirt.data2Y: Convert Rank Data to Y

In kcirt: k-Cube Thurstonian IRT Models

Description

Converts raw rank data to the dichotomous response matrix, Y. Probably no need for user to call; called by kcirt.model and kcirt.sim.

Usage

ikcirt.data2Y(mxData, mxDelta)

Arguments

mxData	Ranked Data. A matrix of positive integers (rankings).
mxDelta	System Delta matrix, elements in {-1,0,1}.

Value

Response matrix with elements in {NA,0,1}.

Author(s)

Dave Zes, Korn/Ferry International

See Also

For the inverse of this function, see ikcirt.Y2data.

Examples

##### here's an itty-bitty example
	
constructMap.ls <- list(
c(1,1,2,2),
c(2,2,3,3),
c(1,1,3,3)
)

qTypes <- rep("M", length(constructMap.ls))

model <- kcirt.model(constructMap.ls=constructMap.ls, qTypes=qTypes, mxLambda=NULL)

#### fake data, two cases (cases run column-wise)
mxData <- t(
rbind(
c( c(1, NA, NA, 4), c(4, NA, NA, 1), c(NA, 4, NA, 1) ),
c( c(1, 4, NA, NA), c(NA, NA, 1, 4), c(NA, 4, 1, NA) )
)
)

ikcirt.data2Y(mxData, mxDelta=model$mxDelta)

kcirt documentation built on May 29, 2017, 5:37 p.m.