returns the proposed /nbn/ with a new topological order without
modifying the joint distribution of all variables.
This allows to directly find regression formulae within the Gaussian Bayesian networks.
The /nbn/ to transform.
The topological order to follow. It can be indicated by names or numbers. When not all nodes are included, the resulting /nbn/ is restricted to these nodes after marginalization.
BE aware that for the moment, no check is made about the topological order and if it is not, the result is FALSE!
The resulting /nbn/.
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