graph-vpar: List of vertices and their parents for graph.
In DataSciBurgoon/gRbase: A Package for Graphical Modelling in R

Description Usage Arguments Value See Also Examples

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)

`object`	An object representing a graph. Valid objects are an adjacency matrix or as a graphNEL.
`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.

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

dag, ug

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

## End(Not run)
## When forceCheck is FALSE, it will not be detected that the graphs are undirected.
vpar(ugMAT, forceCheck=FALSE)
vpar(ugNEL, forceCheck=FALSE)
## Bidirected graphs
## This is, for graphNELs, the same as working with bidirected edges:
if (require(graph)){
graph::edgemode(ugNEL)
graph::edgemode(ugNEL) <- "directed"
graph::edgemode(ugNEL)
vpar(ugNEL,FALSE)
}