This function allows for optimizing models built in lavaan using the BFGS optimizer implemented in lessSEM. Its elements can be accessed with the "@" operator (see examples). The main purpose is to make transformations of lavaan models more accessible.
Usage
bfgs(
lavaanModel,
modifyModel = lessSEM::modifyModel(),
control = lessSEM::controlBFGS()
)Arguments
- lavaanModel
model of class lavaan
- modifyModel
used to modify the lavaanModel. See ?modifyModel.
- control
used to control the optimizer. See ?controlBFGS for more details.
Examples
library(lessSEM)
# Identical to regsem, lessSEM builds on the lavaan
# package for model specification. The first step
# therefore is to implement the model in lavaan.
dataset <- simulateExampleData()
lavaanSyntax <- "
f =~ l1*y1 + l2*y2 + l3*y3 + l4*y4 + l5*y5 +
l6*y6 + l7*y7 + l8*y8 + l9*y9 + l10*y10 +
l11*y11 + l12*y12 + l13*y13 + l14*y14 + l15*y15
f ~~ 1*f
"
lavaanModel <- lavaan::sem(lavaanSyntax,
data = dataset,
meanstructure = TRUE,
std.lv = TRUE)
lsem <- bfgs(
# pass the fitted lavaan model
lavaanModel = lavaanModel)
# the coefficients can be accessed with:
coef(lsem)
# elements of lsem can be accessed with the @ operator:
lsem@parameters