I am trying to implement the skill modeling in Chapter 2 of Model-based machine learning by Winn and Bishop. In the course of the model, I create a factor node that is the product of two categoricals. I found out that this type of node is not implemented in ForneyLab. Before I consider extending ForneyLab, which is currently beyond my abilities, I wondered why this was not implemented, given the complexities of the library. Was it simply that nobody required the functionality, or is the implementation expected to be complex? Thank you!
Gordon