贝叶斯网络的matlab实现。可以创建贝叶斯网络、训练模型

				function pi = CPD_to_pi(CPD, msg_type, n, ps, msg, evidence)
				% CPD_TO_PI Compute pi vector (noisyor)
				% pi = CPD_to_pi(CPD, msg_type, n, ps, msg)
				% Pearl p188 eqn 4.57
				  
				switch msg_type
				 case 'd',
				   pi = sum_prod_CPD_and_pi_msgs(CPD, n, ps, msg);
				   pi = [pi 1-pi]';
				 case 'g', 
				  error('can''t convert noisy-or CPD to Gaussian pi')
				end