public void Predict()
{
Tennis[] data = Tennis.GetData();
Descriptor descriptor = Descriptor.Create<Tennis>();
var generator = new DecisionTreeGenerator(descriptor);
generator.SetHint(0.5d);
LearningModel model = Learner.Learn(data, 0.8, 1000, generator);
var input = new Tennis
{
Outlook = Outlook.Overcast,
Temperature = 20,
Windy = false
};
Tennis predict = model.Model.Predict(input);
Console.WriteLine(predict.Play);
Console.WriteLine(model);
}
static void Main(string[] args)
{
var data = Tennis.GetData();
var descriptor = Descriptor.Create<Tennis>();
var treeGenerator = new DecisionTreeGenerator(descriptor);
treeGenerator.SetHint(false);
var model = Learner.Learn(data, 0.80, 1000, treeGenerator);
System.Console.WriteLine(model);
System.Console.ReadKey();
var t = new Tennis
{
Outlook = Outlook.Overcast,
Temperature = Temperature.Low,
Windy = true
};
var result = model.Model.Predict(t);
System.Console.WriteLine(result.Play);
}
/// <summary>
/// Do the <see cref="SimpleNumlWorkflow" /> using a <c>DecisionTree</c> generator/model.
/// </summary>
static void DoSimple_DecisionTree(Outlook outlook = Outlook.Sunny, double tempF = 15.0d, bool windy = true,
int depth = 5, int width = 2, int repeat = 5000)
{
SimpleNumlWorkflow.SimpleNumlWorkflowImpl(
getData: () => SampleData_ComplexType.GetTennisData_ComplexType(predetermined: false),
getDescriptor: () => Descriptor.Create<Tennis_Complex>(),
getGenerator: (descriptor) =>
{
var generator = new DecisionTreeGenerator(descriptor)
{
Depth = depth,
Width = width
};
generator.SetHint(false);
return generator;
},
getToPredict: () =>
{
return new Tennis_Complex()
{
WeatherConditions = new WeatherConditions()
{
Outlook = outlook,
Temperature = tempF,
Windy = windy,
}
};
},
getPredictionDesc: (t) => "Play: " + t.Play,
trainingPercentage: 0.8d,
repeat: repeat
);
}
public static void Go()
{
// Start with our data
Tennis[] data = SharedData.GetTennisData();
// Create the corresponding descriptor
var descriptor = Descriptor.Create<Tennis>();
// Choose our generator
var generator = new DecisionTreeGenerator(descriptor);
generator.SetHint(false);
Console.WriteLine($"Using the {generator.GetType().Name}\n");
// Create the model by learning from the data using the generator
LearningModel learningModel = Learner.Learn(data, 0.80, 1000, generator);
Console.WriteLine(learningModel);
// Now we could predict using the learning info's Model.
var toPredict = new Tennis()
{
Outlook = Outlook.Rainy,
Temperature = Temperature.Low,
Windy = true,
// Play = ? - This is what we will predict
};
var prediction = learningModel.Model.Predict(toPredict);
// And we're spent...
Console.WriteLine($"ToPredict: {toPredict}");
Console.WriteLine($"Prediction: Play = {prediction.Play}\n");
Console.WriteLine("Press any key...\n");
Console.ReadKey();
}