Prakash P. Shenoy writes:
 > Dear Denver and Bruce,
 > 
 > When you construct join trees, include the subset for which you 
 > desire the joint for. (I have in mind here a method for constructing 
 > join tree starting with subsets for which you have potentials and 
 > subsets for which you desire marginals and then stringing these in a 
 > join tree using variable elimination). Once you have such a join 
 > tree, one can use any known method such as Hugin, Shenoy-Shafer, SPI, 
 > etc. Hong Xu has published a paper on precisely this problem in 
 > Artificial Intelligence Journal (I don't have the exact reference) 
 > using the Shenoy-Shafer architecture.

The reference is:

Hong Xu.  Computing marginals for arbitrary subsets from marginal
representation in Markov trees.  Artificial Intelligence,
74(1):177-189, 1995.

---
Frank Jensen,   [EMAIL PROTECTED]

Hugin Expert A/S
Niels Jernes Vej 10
9220 Aalborg East
DENMARK

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