Add Experience Table to all Chance Nodes

Before performing adaptation or EM-learning, the nodes, whose tables are to be learned, must have an experience table added to them. The “Add Experience Table to all Nodes” function is a utility function, which add these to all relevant nodes. It can be accessed by selecting the “Add Experience Table to all Nodes” item from either the Network Menu, or from the popup menu (brought up by right-clicking on the network).