I am a beginner trying to learn Machine Learning using C#, and I asked ChatGPT to provide me with an example that I can study.

It gave me this code:

using System;
using System.Collections.Generic;
using Microsoft.ML;
using Microsoft.ML.Data;

class Program
{
    static void Main(string[] args)
    {
        // Sample data for demonstration
        List<IrisData> trainingData = new List<IrisData>
        {
            new IrisData { SepalLength = 5.1f, SepalWidth = 3.5f, PetalLength = 1.4f, PetalWidth = 0.2f, Label = "Setosa" },
            new IrisData { SepalLength = 4.9f, SepalWidth = 3.0f, PetalLength = 1.4f, PetalWidth = 0.2f, Label = "Setosa" },
            // Add more data points...
        };

        // Create ML context
        MLContext mlContext = new MLContext();

        // Convert training data to IDataView
        IDataView dataView = mlContext.Data.LoadFromEnumerable(trainingData);

        // Define data preprocessing pipeline
        var pipeline = mlContext.Transforms.Concatenate("Features", "SepalLength", "SepalWidth", "PetalLength", "PetalWidth")
            .Append(mlContext.Transforms.Conversion.MapValueToKey("Label"))
            .Append(mlContext.Transforms.NormalizeMinMax("Features"));

        // Train the model
        var trainedModel = pipeline.Fit(dataView);

        // Create a prediction engine
        var predictionEngine = mlContext.Model.CreatePredictionEngine<IrisData, IrisPrediction>(trainedModel);

        // Sample input for prediction
        var testIris = new IrisData { SepalLength = 5.1f, SepalWidth = 3.5f, PetalLength = 1.4f, PetalWidth = 0.2f };

        // Make a prediction
        var prediction = predictionEngine.Predict(testIris);

        // Output predicted label
        Console.WriteLine($"Predicted flower type: {prediction.PredictedLabel}");
        Console.Read();
    }
}

// Define data classes
public class IrisData
{
    [LoadColumn(0)]
    public float SepalLength;

    [LoadColumn(1)]
    public float SepalWidth;

    [LoadColumn(2)]
    public float PetalLength;

    [LoadColumn(3)]
    public float PetalWidth;

    [LoadColumn(4)]
    public string Label { get; set; }
}

public class IrisPrediction
{
    [ColumnName("PredictedLabel")]
    public string PredictedLabel { get; set; }
}

No errors or warnings. I still don’t know why it only displays the string “Predicted flower type:” every time I run it.

I don’t know if this matters, but I provided a getter and a setter for the Label and PredictedLabel and still the PredictedLabel doesn’t display