CDM (version 4.991-1)

coef: Extract Estimated Item Parameters and Skill Class Distribution Parameters

Description

Extracts the estimated parameters from either din, gdina, gdina or gdm objects.

Usage

"coef"(object, ...)
"coef"(object, ...)
"coef"(object, ...)
"coef"(object, ...)
"coef"(object, ...)

Arguments

object

An object inheriting from either class din, class gdina, class mcdina, class slca or class gdm.

...

Additional arguments to be passed.

Value

A vector, a matrix or a data frame of the estimated parameters for the fitted model.

See Also

din, gdina, gdm, mcdina, slca

Examples

# use sim.dina dataset
data(sim.dina)

# DINA model
d1 <- din(sim.dina, q.matr = sim.qmatrix)
coef(d1)

## Not run: 
# # GDINA model
# d2 <- gdina(sim.dina, q.matr = sim.qmatrix)
# coef(d2)
# 
# # GDM model (use only 10 iterations for computation time reasons)
# theta.k <- seq(-4,4,len=11)
# d3 <- gdm( sim.dina, irtmodel="2PL", theta.k=theta.k, Qmatrix=as.matrix(sim.qmatrix), 
#              centered.latent=TRUE , maxiter=10 )
# coef(d3) 
# ## End(Not run)