R lavann

lavann is a SEM fitting software.

Installation

install.package('lavaan')

Usage

"
Y =~ y1 + y2 + y3
X =~ x1 + x2 + x3
Z =~ z1 + z2 + z3
Y ~ X + Z
" |>
  sem(data = data, std.lv = TRUE) |>
  lavaanPlot(coefs = TRUE)

This displays:

• chi-squared test statistic for the model

• regression coefficients for the measurement model(s), including Z statistics, under the Latent Variables header.

• regression coefficients for the structural model, including Z statistics, under the Regression header

• covariances among latent variables, including Z statistics
• variances of observed variables, including Z statistics

  • Note that certain variances are forced to be 1 by assumption; in this case the variances of latent variables (i.e., X and Z) and the variance of the outcome variable's errors (i.e. .Y; the leading dot indicates a variance).

lavaan estimates latent variances whereas gsem fits data to a model using maximum likelihood. While regression coefficients can be comparable, the methods are fundamentally not.

CategoryRicottone