structuralPart {dagitty}

Extract Structural Part from Structural Equation Model

Description

Removes all observed variables from the input graph.

Usage

structuralPart(x)

Arguments

x

the input graph, a DAG.

Details

Assumes that x is a graph where there are edges between the latent variables, between the observed variables, and from latent to observed variables, but no edge between a latent L and an observed X may have an arrowhead at L.