コード例 #1
0
        public void TestSampling2()
        {
            BayesianNetwork network = new BayesianNetwork();
            BayesianEvent   a       = network.CreateEvent("a");
            BayesianEvent   x1      = network.CreateEvent("x1");
            BayesianEvent   x2      = network.CreateEvent("x2");
            BayesianEvent   x3      = network.CreateEvent("x3");

            network.CreateDependency(a, x1, x2, x3);
            network.FinalizeStructure();

            a.Table.AddLine(0.5, true);         // P(A) = 0.5
            x1.Table.AddLine(0.2, true, true);  // p(x1|a) = 0.2
            x1.Table.AddLine(0.6, true, false); // p(x1|~a) = 0.6
            x2.Table.AddLine(0.2, true, true);  // p(x2|a) = 0.2
            x2.Table.AddLine(0.6, true, false); // p(x2|~a) = 0.6
            x3.Table.AddLine(0.2, true, true);  // p(x3|a) = 0.2
            x3.Table.AddLine(0.6, true, false); // p(x3|~a) = 0.6
            network.Validate();

            SamplingQuery query = new SamplingQuery(network);

            query.DefineEventType(x1, EventType.Evidence);
            query.DefineEventType(x2, EventType.Evidence);
            query.DefineEventType(x3, EventType.Evidence);
            query.DefineEventType(a, EventType.Outcome);
            query.SetEventValue(a, true);
            query.SetEventValue(x1, true);
            query.SetEventValue(x2, true);
            query.SetEventValue(x3, false);
            query.Execute();
            TestPercent(query.Probability, 18);
        }
コード例 #2
0
        public void TestSampling1()
        {
            BayesianNetwork network = new BayesianNetwork();
            BayesianEvent   a       = network.CreateEvent("a");
            BayesianEvent   b       = network.CreateEvent("b");

            network.CreateDependency(a, b);
            network.FinalizeStructure();
            a.Table.AddLine(0.5, true);        // P(A) = 0.5
            b.Table.AddLine(0.2, true, true);  // p(b|a) = 0.2
            b.Table.AddLine(0.8, true, false); // p(b|~a) = 0.8
            network.Validate();

            SamplingQuery query = new SamplingQuery(network);

            query.DefineEventType(a, EventType.Evidence);
            query.DefineEventType(b, EventType.Outcome);
            query.SetEventValue(b, true);
            query.SetEventValue(a, true);
            query.Execute();
            TestPercent(query.Probability, 20);
        }