The scm class structure

Description

The structure of an object of S3 class scm.

Usage

as.scm(x, ...)
## S3 method for class 'bn'
as.scm(x, ...)

Arguments

Details

An object of class scm is a list containing at least the following components:

• roles: a list with three named elements:

  • factual: a vector of character strings, the labels of the factual nodes in the structural causal model.

  • exogenous: a vector of character strings, the labels of the exogenous nodes in the structural causal model.

  • counterfactual: a vector of character strings, the labels of the counterfactual nodes in the structural causal model. Unlike previous elements, it can be empty.

• nodes: a list. Each element is named after a node and contains the following elements:

  • counterfactual: a character string.

    • For a factual node, it contains the label of the corresponding counterfactual node (if any).

    • For an exogenous node, it contains the label of the counterfactual node linked to it (if any).

    • For a counterfactual node, it is set to character(0).

  • exogenous: a character string.

    • For a factual or counterfactual node, it contains the label of the corresponding exogenous node (if any).

    • For an exogenous node, it is set to character(0).

  • factual: a character string.

    • For a counterfactual node, it contains the label of the corresponding factual node.

    • For an exogenous node, it contains the label of the factual node linked to it (if any).

    • For a factual node, it is set to character(0).

  • parents: the parents of the node (a vector of character strings). Note that exogenous nodes are not listed among the parents of factual and counterfactual nodes.

  • children: the children of the node (a vector of character strings). Note that factual and counterfactual nodes are not listed among the children of exogenous nodes.

• arcs: the arcs of the structural causal model (a two-column matrix, whose columns are labeled from and to), including the arcs between exogenous and factual/counterfactual nodes.

Author(s)

Marco Scutari