Convert Unified Factor Scores to Group List (or Vice Versa)

fs_to_group_list() converts a unified factor-score data frame (single data frame with a group column and list-valued attributes) into the legacy list-of-data-frames shape with per-group attributes. It acts as its own inverse: if given a group list, it converts back to the unified shape.

Usage

fs_to_group_list(fs)

Arguments

fs

Object returned by get_fs(). Either a unified data frame (with a group column and list-valued attributes) or a named list of data frames (one per group) with per-group attributes.

Value

If fs is a unified data frame, returns a named list of data frames, one per group, with fsT, fsL, fsb, scoring_matrix, and fs_pattern attached as per-group attributes on each element and as list-valued attributes on the outer list. If fs is a group list, returns a single data frame with a group column and list-valued attributes. A single-group input returns a single data frame (not a list) in either direction.

Examples

library(lavaan)
hs_model <- "visual =~ x1 + x2 + x3"
fit <- cfa(hs_model, data = HolzingerSwineford1939, group = "school")
fs_unified <- get_fs(fit)                     # unified df
fs_list <- fs_to_group_list(fs_unified)       # list-of-df shape
fs_back <- fs_to_group_list(fs_list)          # back to unified
all.equal(fs_unified, fs_back, check.attributes = FALSE)
#> [1] TRUE