Convert the matrix simulation state to a long data frame of responses.

meow() represents responses as a respondent-by-item matrix (R) together with an administration matrix (admin). This helper returns the administered responses as a long data frame with columns id, item, and resp, ordered by respondent and then by the order in which items were administered. It is the recommended bridge for module authors who prefer to work with tidyverse-style long data inside their own item selection or parameter update functions.

Usage

meow_long(R, admin)

Arguments

R

A respondent-by-item matrix of (potential) responses.

admin

An administration matrix the same shape as R. Non-zero entries indicate administered items; positive integer entries additionally encode the order of administration.

Value

A long-form data frame with columns id, item, and resp containing only the administered responses.

Examples

R <- matrix(c(1, 0, 1, 1), nrow = 2)
admin <- matrix(c(1L, 0L, 2L, 1L), nrow = 2)
meow_long(R, admin)
#>   id item resp
#> 1  1    1    1
#> 2  1    2    1
#> 3  2    2    1