Indicator loadings of a SEM's composite constructs

Returns the indicator-to-construct loadings for every composite declared with drm_composite(), reported separately from the structural paths() (a composite's measurement structure is not a causal path). Empty if the SEM has no composites.

Usage

loadings(object, ...)

# S3 method for class 'drm_sem'
loadings(object, ...)

Arguments

object: A drm_sem object.
...: Unused.

Value

A drm_loadings data frame with columns composite, indicator, loading, method.

References

Bollen KA, Lennox R (1991). “Conventional Wisdom on Measurement: A Structural Equation Perspective.” Psychological Bulletin, 110(2), 305–314. doi:10.1037/0033-2909.110.2.305 .

Grace JB, Bollen KA (2008). “Representing General Theoretical Concepts in Structural Equation Models: The Role of Composite Variables.” Environmental and Ecological Statistics, 15(2), 191–213. doi:10.1007/s10651-007-0047-7 .

Examples

if (FALSE) { # \dontrun{
sem <- drm_sem(
  fitness = drm_node(drmTMB::bf(fitness ~ body_size), family = stats::gaussian()),
  data = dat,
  composites = drm_composite("body_size", c("len", "mass"), data = dat))
loadings(sem)
} # }