package aima.core.probability.example;
import aima.core.probability.bayes.BayesianNetwork;
import aima.core.probability.bayes.FiniteNode;
import aima.core.probability.bayes.impl.BayesNet;
import aima.core.probability.bayes.impl.FullCPTNode;
/**
*
* @author Ciaran O'Reilly
*
*/
public class BayesNetExampleFactory {
public static BayesianNetwork construct2FairDiceNetwor() {
FiniteNode dice1 = new FullCPTNode(ExampleRV.DICE_1_RV, new double[] {
1.0 / 6.0, 1.0 / 6.0, 1.0 / 6.0, 1.0 / 6.0, 1.0 / 6.0,
1.0 / 6.0 });
FiniteNode dice2 = new FullCPTNode(ExampleRV.DICE_2_RV, new double[] {
1.0 / 6.0, 1.0 / 6.0, 1.0 / 6.0, 1.0 / 6.0, 1.0 / 6.0,
1.0 / 6.0 });
return new BayesNet(dice1, dice2);
}
public static BayesianNetwork constructToothacheCavityCatchNetwork() {
FiniteNode cavity = new FullCPTNode(ExampleRV.CAVITY_RV, new double[] {
0.2, 0.8 });
@SuppressWarnings("unused")
FiniteNode toothache = new FullCPTNode(ExampleRV.TOOTHACHE_RV,
new double[] {
// C=true, T=true
0.6,
// C=true, T=false
0.4,
// C=false, T=true
0.1,
// C=false, T=false
0.9
}, cavity);
@SuppressWarnings("unused")
FiniteNode catchN = new FullCPTNode(ExampleRV.CATCH_RV, new double[] {
// C=true, Catch=true
0.9,
// C=true, Catch=false
0.1,
// C=false, Catch=true
0.2,
// C=false, Catch=false
0.8 }, cavity);
return new BayesNet(cavity);
}
public static BayesianNetwork constructToothacheCavityCatchWeatherNetwork() {
FiniteNode cavity = new FullCPTNode(ExampleRV.CAVITY_RV, new double[] {
0.2, 0.8 });
@SuppressWarnings("unused")
FiniteNode toothache = new FullCPTNode(ExampleRV.TOOTHACHE_RV,
new double[] {
// C=true, T=true
0.6,
// C=true, T=false
0.4,
// C=false, T=true
0.1,
// C=false, T=false
0.9
}, cavity);
@SuppressWarnings("unused")
FiniteNode catchN = new FullCPTNode(ExampleRV.CATCH_RV, new double[] {
// C=true, Catch=true
0.9,
// C=true, Catch=false
0.1,
// C=false, Catch=true
0.2,
// C=false, Catch=false
0.8 }, cavity);
FiniteNode weather = new FullCPTNode(ExampleRV.WEATHER_RV,
new double[] {
// sunny
0.6,
// rain
0.1,
// cloudy
0.29,
// snow
0.01 });
return new BayesNet(cavity, weather);
}
public static BayesianNetwork constructMeningitisStiffNeckNetwork() {
FiniteNode meningitis = new FullCPTNode(ExampleRV.MENINGITIS_RV,
new double[] { 1.0 / 50000.0, 1.0 - (1.0 / 50000.0) });
@SuppressWarnings("unused")
FiniteNode stiffneck = new FullCPTNode(ExampleRV.STIFF_NECK_RV,
new double[] {
// M=true, S=true
0.7,
// M=true, S=false
0.3,
// M=false, S=true
0.009986199723994478,
// M=false, S=false
0.9900138002760055
}, meningitis);
return new BayesNet(meningitis);
}
public static BayesianNetwork constructBurglaryAlarmNetwork() {
FiniteNode burglary = new FullCPTNode(ExampleRV.BURGLARY_RV,
new double[] { 0.001, 0.999 });
FiniteNode earthquake = new FullCPTNode(ExampleRV.EARTHQUAKE_RV,
new double[] { 0.002, 0.998 });
FiniteNode alarm = new FullCPTNode(ExampleRV.ALARM_RV, new double[] {
// B=true, E=true, A=true
0.95,
// B=true, E=true, A=false
0.05,
// B=true, E=false, A=true
0.94,
// B=true, E=false, A=false
0.06,
// B=false, E=true, A=true
0.29,
// B=false, E=true, A=false
0.71,
// B=false, E=false, A=true
0.001,
// B=false, E=false, A=false
0.999 }, burglary, earthquake);
@SuppressWarnings("unused")
FiniteNode johnCalls = new FullCPTNode(ExampleRV.JOHN_CALLS_RV,
new double[] {
// A=true, J=true
0.90,
// A=true, J=false
0.10,
// A=false, J=true
0.05,
// A=false, J=false
0.95 }, alarm);
@SuppressWarnings("unused")
FiniteNode maryCalls = new FullCPTNode(ExampleRV.MARY_CALLS_RV,
new double[] {
// A=true, M=true
0.70,
// A=true, M=false
0.30,
// A=false, M=true
0.01,
// A=false, M=false
0.99 }, alarm);
return new BayesNet(burglary, earthquake);
}
public static BayesianNetwork constructCloudySprinklerRainWetGrassNetwork() {
FiniteNode cloudy = new FullCPTNode(ExampleRV.CLOUDY_RV, new double[] {
0.5, 0.5 });
FiniteNode sprinkler = new FullCPTNode(ExampleRV.SPRINKLER_RV,
new double[] {
// Cloudy=true, Sprinkler=true
0.1,
// Cloudy=true, Sprinkler=false
0.9,
// Cloudy=false, Sprinkler=true
0.5,
// Cloudy=false, Sprinkler=false
0.5 }, cloudy);
FiniteNode rain = new FullCPTNode(ExampleRV.RAIN_RV, new double[] {
// Cloudy=true, Rain=true
0.8,
// Cloudy=true, Rain=false
0.2,
// Cloudy=false, Rain=true
0.2,
// Cloudy=false, Rain=false
0.8 }, cloudy);
@SuppressWarnings("unused")
FiniteNode wetGrass = new FullCPTNode(ExampleRV.WET_GRASS_RV,
new double[] {
// Sprinkler=true, Rain=true, WetGrass=true
.99,
// Sprinkler=true, Rain=true, WetGrass=false
.01,
// Sprinkler=true, Rain=false, WetGrass=true
.9,
// Sprinkler=true, Rain=false, WetGrass=false
.1,
// Sprinkler=false, Rain=true, WetGrass=true
.9,
// Sprinkler=false, Rain=true, WetGrass=false
.1,
// Sprinkler=false, Rain=false, WetGrass=true
0.0,
// Sprinkler=false, Rain=false, WetGrass=false
1.0 }, sprinkler, rain);
return new BayesNet(cloudy);
}
}