protected static void demoBurglaryAlarmModel(IFiniteProbabilityModel model)
{
System.Console.WriteLine("--------------------");
System.Console.WriteLine("Burglary Alarm Model");
System.Console.WriteLine("--------------------");
AssignmentProposition aburglary = new AssignmentProposition(
ExampleRV.BURGLARY_RV, true);
AssignmentProposition anotburglary = new AssignmentProposition(
ExampleRV.BURGLARY_RV, false);
AssignmentProposition anotearthquake = new AssignmentProposition(
ExampleRV.EARTHQUAKE_RV, false);
AssignmentProposition aalarm = new AssignmentProposition(
ExampleRV.ALARM_RV, true);
AssignmentProposition anotalarm = new AssignmentProposition(
ExampleRV.ALARM_RV, false);
AssignmentProposition ajohnCalls = new AssignmentProposition(
ExampleRV.JOHN_CALLS_RV, true);
AssignmentProposition amaryCalls = new AssignmentProposition(
ExampleRV.MARY_CALLS_RV, true);
// AIMA3e pg. 514
System.Console.WriteLine("P(j,m,a,~b,~e) = "
+ model.prior(ajohnCalls, amaryCalls, aalarm, anotburglary,
anotearthquake));
System.Console.WriteLine("P(j,m,~a,~b,~e) = "
+ model.prior(ajohnCalls, amaryCalls, anotalarm, anotburglary,
anotearthquake));
// AIMA3e. pg. 514
// P<>(Alarm | JohnCalls = true, MaryCalls = true, Burglary = false,
// Earthquake = false)
// = <0.558, 0.442>
System.Console
.WriteLine("P<>(Alarm | JohnCalls = true, MaryCalls = true, Burglary = false, Earthquake = false) = "
+ model.posteriorDistribution(ExampleRV.ALARM_RV,
ajohnCalls, amaryCalls, anotburglary,
anotearthquake));
// AIMA3e pg. 523
// P<>(Burglary | JohnCalls = true, MaryCalls = true) = <0.284, 0.716>
System.Console
.WriteLine("P<>(Burglary | JohnCalls = true, MaryCalls = true) = "
+ model.posteriorDistribution(ExampleRV.BURGLARY_RV,
ajohnCalls, amaryCalls));
// AIMA3e pg. 528
// P<>(JohnCalls | Burglary = true)
System.Console.WriteLine("P<>(JohnCalls | Burglary = true) = "
+ model.posteriorDistribution(ExampleRV.JOHN_CALLS_RV,
aburglary));
}
protected static void demoToothacheCavityCatchModel(IFiniteProbabilityModel model)
{
System.Console.WriteLine("Toothache, Cavity, and Catch Model");
System.Console.WriteLine("----------------------------------");
AssignmentProposition atoothache = new AssignmentProposition(
ExampleRV.TOOTHACHE_RV, true);
AssignmentProposition acavity = new AssignmentProposition(
ExampleRV.CAVITY_RV, true);
AssignmentProposition anotcavity = new AssignmentProposition(
ExampleRV.CAVITY_RV, false);
AssignmentProposition acatch = new AssignmentProposition(
ExampleRV.CATCH_RV, true);
// AIMA3e pg. 485
System.Console.WriteLine("P(cavity) = " + model.prior(acavity));
System.Console.WriteLine("P(cavity | toothache) = "
+ model.posterior(acavity, atoothache));
// AIMA3e pg. 492
DisjunctiveProposition cavityOrToothache = new DisjunctiveProposition(
acavity, atoothache);
System.Console.WriteLine("P(cavity OR toothache) = "
+ model.prior(cavityOrToothache));
// AIMA3e pg. 493
System.Console.WriteLine("P(~cavity | toothache) = "
+ model.posterior(anotcavity, atoothache));
// AIMA3e pg. 493
// P<>(Cavity | toothache) = <0.6, 0.4>
System.Console.WriteLine("P<>(Cavity | toothache) = "
+ model.posteriorDistribution(ExampleRV.CAVITY_RV, atoothache));
// AIMA3e pg. 497
// P<>(Cavity | toothache AND catch) = <0.871, 0.129>
System.Console.WriteLine("P<>(Cavity | toothache AND catch) = "
+ model.posteriorDistribution(ExampleRV.CAVITY_RV, atoothache,
acatch));
}