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# utility function related to EFA
# generate 'efa' syntax for a single block of factors
lav_syntax_efa <- function(ov.names = NULL, nfactors = 1L, twolevel = FALSE) {
if (twolevel) {
tmp <- lav_syntax_efa(ov.names = ov.names, nfactors = nfactors)
model <- c("level: 1", tmp, "level: 2", tmp)
} else {
model <- character(nfactors)
for (f in seq_len(nfactors)) {
txt <- paste('efa("efa")*f', f, " =~ ",
paste(ov.names, collapse = " + "),
sep = ""
)
model[f] <- txt
}
}
model
}
# extract *standardized* loadings from efaList
lav_efa_get_loadings <- function(object, ...) {
# kill object$loadings if present
object[["loadings"]] <- NULL
out <- lapply(object, function(x) {
STD <- lavTech(x, "std",
add.class = TRUE, add.labels = TRUE,
list.by.group = FALSE
)
lambda.idx <- which(names(STD) == "lambda")
LAMBDA <- STD[lambda.idx]
names(LAMBDA) <- NULL
# if only single block, drop list
if (length(LAMBDA) == 1L) {
LAMBDA <- LAMBDA[[1]]
} else {
names(LAMBDA) <- x@Data@block.label
}
LAMBDA
})
# drop list if only a single model
if (length(out) == 1L) {
out <- out[[1]]
}
out
}
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