After 5 years I have got around to releasing an update to my previous 
program xbaies version 1.3. The new version is called xbaies2. Here are 
some details.


Platform: Windows  (Sparc version available soon (3 months from now?).
Restrictions: Free for educational establishment use for education and
research only; any commercial use forbidden.

Xbaies version 2 is a program for building chain graph-networks of
discrete random variables and multistage discrete decision networks, and
uses junction tree propagation for inference and finding optimal
decisions.  There are many features implemented for learning and
monitoring probabilities of given networks. Specification of decision
problems is similar to that of influence diagrams, but, instead of
diagramatically including information arcs,  the natural ordering iin
which the decisions are taken and random variables are revealed is
specified numerically. Optimal decisions (and also sub optimal decisions)
may be read off  by inspection of values in the cliques of a junction
tree.  

The software is available via my home page at http://www.city.ac.uk/~rgc

Robert Cowell






Robert Cowell
Department of Actuarial Science and Statistics
City University
Northampton Square
London EC1V 0HB
 
tel: (44)171 - 477 - 8454
fax  (44)171 - 477 - 8838
www: http://www.city.ac.uk/~rgc

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