pcalg2dagitty function

Transform the adjacency matrix from pcalg into a dagitty object

Transform the adjacency matrix of type amat.cpdag or amat.pag (for details on coding see amatType). data

pcalg2dagitty(amat, labels, type = "cpdag")

Arguments

• amat: adjacency matrix of type amat.cpdag or amat.pag
• labels: character vector of variable (or “node”) names.
• type: string specifying the type of graph of the adjacency matrix amat. It can be a DAG (type="dag"), a CPDAG (type="cpdag") or a maximally oriented PDAG (type="pdag") from Meek (1995); then the type of adjacency matrix is assumed to be amat.cpdag. It can also be a MAG (type = "mag") or a PAG (type="pag"); then the type of the adjacency matrix is assumed to be amat.pag.

Details

For a given adjacency matrix amat the form amat.cpdag or amat.pag and a specified graph type, this function returns a dagitty object corresponding to the graph structure specified by amat, labels and type. The resulting object is compatible with the dagitty package.

Returns

A dagitty graph (see the dagitty package).

Author(s)

Emilija Perkovic and Markus Kalisch

Examples

data(gmG)
n <- nrow    (gmG8$x)
V <- colnames(gmG8$x) # labels aka node names

amat <- wgtMatrix(gmG8$g)
amat[amat != 0] <- 1
if(requireNamespace("dagitty", quietly = TRUE)) {
dagitty_dag1 <- pcalg2dagitty(amat,V,type="dag")
}