Forbidden Arcs

Context

• In BayesiaLab, you can formally prohibit arcs by defining so-called Forbidden Arcs.
• Defining Forbidden Arcs prevents BayesiaLab’s learning algorithms from adding such arcs to the network during the structural learning process.

Usage

• You can define the Forbidden Arcs in the Forbidden Arc Editor.
• The Forbidden Arc Editor can be accessed in multiple ways:
  • Select Main Menu > Edit > Edit Forbidden Arcs.
  • Select Arc Context Menu > Forbidden Arcs.
  • Click the Forbidden Arc indicator in the Status Bar.
• The Forbidden Arc Editor features five buttons:

Context Menu — Forbidden Arcs

• In addition to managing Forbidden Arcs via the Forbidden Arc Editor, you can apply constraints ad hoc via the Arc Context Menu:
  • Right-click on an arc or a selection of arcs.
  • From the Context Menu, select Forbid, and then choose one of the following:
    • Current Direction
    • Opposite Direction
    • Both Directions