Extension to InferenceEngine query() method for joint probabilities

[NShah19]

Description

The query() method for the InferenceEngine currently supports the computation of baseline marginals such as P(X) but does not allow for the computation of joint probabilities such as P(X, Y, Z).

Context

In a causal network, we are often concerned with the relationships between nodes and the probabilities of two simultaneous events. While joint probabilities can be calculated with the current API they do require considerable additional computation and the additional functionality of such an extension to the query() method would be of considerable benefit to the community.

Possible Implementation

Mathematically, P(X, Y, Z) can be calculated from P(X|Y,Z)P(Y|Z)P(Z)

[ElisabethSesterHussQB]

Thank you for the push! We have implemented a new method to compute joint distributions. This new feature will be part of the next release and hopefully available soon!