graph_vpar: List of vertices and their parents for graph.

In gRbase: A Package for Graphical Modelling in R

List of vertices and their parents for graph.

Description

Get list of vertices and their parents for graph.

Usage

vchi(object, getv = TRUE, forceCheck = TRUE)

vchiMAT(object, getv = TRUE, forceCheck = TRUE)

vpar(object, getv = TRUE, forceCheck = TRUE)

vparMAT(object, getv = TRUE, forceCheck = TRUE)

Arguments

object	An object representing a graph. Valid objects are an adjacency matrix or an igraph.
getv	The result is by default a list of vectors of the form (v, pa1, pa2, ... paN) where pa1, pa2, ... paN are the parents of v. If getv is FALSE then the vectors will have the form (pa1, pa2, ... paN)
forceCheck	Logical indicating if it should be checked that the object is a DAG.

Value

A list of vectors where each vector will have the form (v, pa1, pa2, ... paN) where pa1, pa2, ... paN are the parents of v.

See Also

dag, ug

Examples

## DAGs
dag_mat <- dag(~a:b:c + c:d:e, result="matrix")
dag_ig <- dag(~a:b:c + c:d:e)
vpar(dag_mat)
vpar(dag_ig)
vpar(dag_mat, getv=FALSE)
vpar(dag_ig, getv=FALSE)
## Undirected graphs
ug_mat <- ug(~a:b:c + c:d:e, result="matrix")
ug_ig <- ug(~a:b:c + c:d:e)
## Not run: 
## This will fail because the adjacency matrix is symmetric and the
## graph has undirected edges
vpar(ug_mat)
vpar(ug_ig)

## End(Not run)
## When forceCheck is FALSE, it will not be detected that the
#g raphs are undirected.
vpar(ug_mat, forceCheck=FALSE)
vpar(ug_ig, forceCheck=FALSE)

gRbase documentation built on Oct. 22, 2024, 5:06 p.m.