graphID.globalID: Check for global identifiability of a mixed graph.

In SEMID: Identifiability of Linear Structural Equation Models

Description

Checks for the global identifiability of a mixed graph using techniques presented in Drton, Foygel, Sullivant (2011).

Usage

graphID.globalID(L, O)

Arguments

L	Adjacency matrix for the directed part of the path diagram/mixed graph; an edge pointing from i to j is encoded as L[i,j]=1 and the lack of an edge between i and j is encoded as L[i,j]=0. There should be no directed self loops, i.e. no i such that L[i,i]=1.
O	Adjacency matrix for the bidirected part of the path diagram/mixed graph. Edges are encoded as for the L parameter. Again there should be no self loops. Also this matrix will be coerced to be symmetric so it is only necessary to specify an edge once, i.e. if O[i,j]=1 you may, but are not required to, also have O[j,i]=1.

Value

TRUE if the graph was globally identifiable, FALSE otherwise.

References

Drton, Mathias; Foygel, Rina; Sullivant, Seth. Global identifiability of linear structural equation models. Ann. Statist. 39 (2011), no. 2, 865–886.

SEMID documentation built on May 21, 2019, 9:03 a.m.