separate: splits item response vectors of DIF items by group
In lordif: Logistic Ordinal Regression Differential Item Functioning using IRT

Splits item response vectors of DIF items into separate group-specific vectors.

1	separate(resp, flag, gr)

`resp`	a data frame (or matrix) of item responses
`flag`	a vector of DIF flags
`gr`	a vector of group identifiers

To obtain group specific item calibrations, response vectors of DIF items are split into multiple vectors by group and treated as separate items.

Returns a data frame with item response vectors for non-DIF items followed by separated item response vectors for DIF items

Seung W. Choi <choi.phd@gmail.com>

1	## Not run: separate(resp,flag,gr)

lordif documentation built on May 2, 2019, 2:13 p.m.

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