coef_item {hIRT} | R Documentation |
Parameter Estimates from Hierarchical IRT Models.
Description
Parameter estimates from either hltm
or hgrm
models. code_item
reports estimates of item parameters. coef_mean
reports results for the mean equation.
coef_var
reports results for the variance equation.
Usage
coef_item(x, by_item = TRUE, digits = 3)
coef_mean(x, digits = 3)
coef_var(x, digits = 3)
Arguments
x |
An object of class |
by_item |
Logical. Should item parameters be stored item by item
(if |
digits |
The number of significant digits to use when printing |
Value
Parameter estimates, standard errors, z values, and p values
organized as a data frame (if by_item = TRUE
) or a list (if
by_item = FALSE
).
Examples
y <- nes_econ2008[, -(1:3)]
x <- model.matrix( ~ party * educ, nes_econ2008)
z <- model.matrix( ~ party, nes_econ2008)
nes_m1 <- hgrm(y, x, z)
coef_item(nes_m1)
coef_mean(nes_m1)
coef_var(nes_m1)
[Package hIRT version 0.3.0 Index]