collapse_data: Collapses data for a given collapsing function

In IMTest: Information Matrix Test for Generalized Partial Credit Models

Description

Collapses data for a given collapsing function

Usage

collapse_data(data, collapse, constraint)

Arguments

data	A dataset with J columns and n rows.
collapse	A list of length J indicating the scoring function to collapse from.
constraint	Constraint is either "rasch" or "gpcm" depending on which parameter constraints should be run.

Value

A list containing the collapsed data and a indicator vector for which parameters to test with the IMT. If no collapsing has occurred, the default indicator vector tests all parameters of the last item.

Examples

data(dataset)
collapse = split(rep(c(1:4), 10), rep(1:10, each = 4))
my_data = collapse_data(dataset, collapse, "rasch")
# See vignette("IMT-vignette") for more examples.

IMTest documentation built on May 1, 2019, 9:06 p.m.