public TrainingSet(string outputName, TrainingEntry c45Entry, params TrainingEntry[] entries)
{
this.Samples = new List <TrainingSample>();
this.OutputName = outputName;
this.C45Entry = c45Entry;
this.Entries = entries;
}
static void Main(string[] args)
{
TrainingEntry entry1 = new TrainingEntry("AGE", null);
TrainingEntry entry2 = new TrainingEntry("MODEL", new string[] { "X3", "X5" });
TrainingEntry entry3 = new TrainingEntry("GENDER", new string[] { "MALE", "FEMALE" });
TrainingSet set = new TrainingSet("SATISFIED", entry1, entry2, entry3);
set.AddSample(new TrainingSample(false, 21, "X5", "MALE"));
set.AddSample(new TrainingSample(true, 19, "X3", "FEMALE"));
set.AddSample(new TrainingSample(false, 22, "X5", "MALE"));
set.AddSample(new TrainingSample(true, 21, "X3", "MALE"));
set.AddSample(new TrainingSample(true, 30, "X3", "MALE"));
set.AddSample(new TrainingSample(false, 60, "X3", "FEMALE"));
set.AddSample(new TrainingSample(false, 45, "X3", "FEMALE"));
set.AddSample(new TrainingSample(false, 55, "X3", "MALE"));
set.Lock();
Trainer trainer = new Trainer(set);
trainer.TrainID3(set);
Console.ReadKey();
}
public void TrainID3(TrainingSet set)
{
string master = this.CalculateHead(set);
Console.WriteLine("HEAD NODE = " + master);
Console.WriteLine();
StringBuilder sb = new StringBuilder(1000);
for (int i = 0; i < set.Entries.Length; i++)
{
TrainingEntry current = set.Entries[i];
if (i == 0)
{
sb.AppendLine(GetHeadC45Name(set) + " <= " + GetHeadC45(set));
}
if (current.Name.Equals(master, StringComparison.InvariantCultureIgnoreCase))
{
for (int j = 0; j < current.Values.Length; j++)
{
string currentName = current.Values[j];
TrainingSet currentExcept = this.GetExceptBranch(set, currentName);
TrainingSet currentExcept2 = GetExceptLowerBranch(currentExcept, GetHeadC45(set));
string subBranch = CalculateHead(currentExcept2);
string subName = currentName;
sb.AppendLine("--------- SUB NODE = " + subBranch);
sb.AppendLine("\t\t VALUE = " + subName);
if (!subBranch.Equals(master))
{
sb.AppendLine("|");
sb.AppendLine("|");
sb.AppendLine("--------- SUB NODE = " + currentName);
PrintSubBranch(currentExcept2, sb, subBranch);
sb.AppendLine("|");
sb.AppendLine("|");
}
else
{
sb.AppendLine("\t\t(" + CalculateResult(currentExcept2, subName) + ")");
}
//Console.WriteLine("name = " + currentName + "\t\t sub = " + subName + " -- scale = " + currentScale);
}
}
if (i == 0)
{
sb.AppendLine(GetHeadC45Name(set) + " > " + GetHeadC45(set));
}
if (i == 0)
{
sb.AppendLine("(False)");
}
}
Console.WriteLine(sb.ToString());
}
