dendrify {irtrees} | R Documentation |
Measurement Mapping for an IRTree Model
Description
Expands a wide-form matrix of item responses to a long-form data frame of sub-item responses
Usage
dendrify(mat, cmx)
Arguments
mat |
An integer matrix of IRT responses (columns represent items, rows represent respondents) |
cmx |
A mapping matrix with as many rows as there are response options for the items. |
Value
A data frame with one row per sub-item response
Author(s)
Ivailo Partchev
References
De Boeck, P. and Partchev, I. (2012). IRTrees: Tree-Based Item Response Models of the GLMM Family, Journal of Statistical Software – Code Snippets, 48(1), 1–28. https://www.jstatsoft.org/v48/c01/.
See Also
Examples
mapping <- cbind(c(0,1,1), c(NA,0,1))
str(linrespT <- dendrify(linresp, mapping))
[Package irtrees version 1.0.0 Index]