lordif (version 0.4.2)

extract: extracts IRT item parameters

Description

Extracts IRT item parameter estimates from an output returned from mirt::mirt()

Usage

extract(ipar)

Value

a data frame containing item parameter estimates in the order of a, cb1, cb2,..., cb(maxCat-1).

Arguments

ipar

output from the mirt::mirt() function of the mirt package

Author

Seung W. Choi <[e-mail]>

Details

similar to the coef function in the mirt package

See Also

lordif, mirt::mirt()

Examples

##calib.sparse <- mirt(sparse.matrix,1,itemtype="gpcm") 
if (FALSE) ipar.sparse <- extract(calib.sparse)