structuralPart: 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.