贝叶斯网络的matlab实现。可以创建贝叶斯网络、训练模型

				function m = marginal_nodes(engine, query)
				% MARGINAL_NODES Compute the marginal on the specified query nodes (quickscore)
				% marginal = marginal_nodes(engine, query)
				%
				% 'query' must be a single disease (root) node.
				
				assert(length(query)==1);
				p = engine.post(query);
				m.T = [1-p p]';
				m.domain = query;