graph_vpar function

List of vertices and their parents for graph.

Get list of vertices and their parents for graph.

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.

Returns

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

are the parents of v.

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)

See Also

dag, ug