WtoL_single.tree {irtrees} | R Documentation |
Wide-to-long, one tree
Description
Recode a wide format data frame to a long format IRTrees data frame in the case when all items have the same tree structure
Usage
WtoL_single.tree(
data,
cmx,
id.col,
resp.col,
covar.col = NULL,
time.col = NULL
)
Arguments
data |
a wide-format (person-by-item) data set |
cmx |
a a category-by-node mapping matrix |
id.col |
the ID column |
resp.col |
the columns containing the item responses |
covar.col |
columns containing covariates |
time.col |
the time column when there are repeated (longitudinal) data |
Details
Many examples of mapping matrices are given in the vignette. Columns may be specified by numeric index or by name. Response categories must be coded with consecutive integers starting from 1, not 0. Missing data should be properly represented as NA.
[Package irtrees version 1.0.0 Index]