mod2values: Convert an estimated mirt model to a data.frame

In philchalmers/mirt: Multidimensional Item Response Theory

Convert an estimated mirt model to a data.frame

Description

Given an estimated model from any of mirt's model fitting functions this function will convert the model parameters into the design data frame of starting values and other parameter characteristics (similar to using the pars = 'values' for obtaining starting values).

Usage

mod2values(x)

Arguments

x	an estimated model x from the mirt package

Author(s)

Phil Chalmers [e-mail]

References

Chalmers, R., P. (2012). mirt: A Multidimensional Item Response Theory Package for the R Environment. Journal of Statistical Software, 48(6), 1-29. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.18637/jss.v048.i06")}

See Also

extract.mirt

Examples

## Not run: 
dat <- expand.table(LSAT7)
mod <- mirt(dat, 1)
values <- mod2values(mod)
values

#use the converted values as starting values in a new model, and reduce TOL
mod2 <- mirt(dat, 1, pars = values, TOL=1e-5)


## End(Not run)

philchalmers/mirt documentation built on April 14, 2024, 6:41 p.m.