simDAG (version 0.2.2)

as.igraph.DAG: Transform a DAG object into an igraph object

Description

This function extends the as.igraph function from the igraph package to allow the input of a DAG object. The result is an igraph object that includes only the structure of the DAG, not any specifications. May be useful for plotting purposes.

Usage

# S3 method for DAG
as.igraph(x, ...)

Value

Returns a igraph object.

Arguments

x

A DAG object created using the empty_dag function with nodes added to it using the + syntax. See ?empty_dag or ?node for more details. Supports DAGs with time-dependent nodes added using the node_td function. However, including such DAGs may result in cyclic causal structures, because time is not represented in the output matrix.

...

Currently not used.

Author

Robin Denz

See Also

empty_dag, node, node_td

Examples

library(simDAG)

# some example DAG
dag <- empty_dag() +
  node("death", type="binomial", parents=c("age", "sex"), betas=c(1, 2),
       intercept=-10) +
  node("age", type="rnorm", mean=10, sd=2) +
  node("sex", parents="", type="rbernoulli", p=0.5) +
  node("smoking", parents=c("sex", "age"), type="binomial",
       betas=c(0.6, 0.2), intercept=-2)

if (requireNamespace("igraph")) {
  g <- igraph::as.igraph(dag)
  plot(g)
}