Microsoft.ML 在使用 LoadFromEnumerable 时添加标签

如何解决Microsoft.ML 在使用 LoadFromEnumerable 时添加标签

有些东西不起作用，我想不通...... 我想从列表中加载数据。我已经尝试了几个代码

MLContext mlContext = new MLContext();

        var listData = new List<ProductEntry>
        {
            new ProductEntry {copurchaseProductID = 12,ProductID = 4},new ProductEntry {copurchaseProductID = 12,ProductID = 3},new ProductEntry {copurchaseProductID = 11,ProductID = 5},ProductID = 3}
        };
        var data = mlContext.Data.LoadFromEnumerable(listData);
        var options = new MatrixFactorizationTrainer.Options
        {
            MatrixColumnIndexColumnName = nameof(ProductEntry.ProductID),MatrixRowIndexColumnName = nameof(ProductEntry.copurchaseProductID),LabelColumnName = "Label",LossFunction = MatrixFactorizationTrainer.LossFunctionType.SquareLossOneClass,Alpha = 0.01,Lambda = 0.025,Quiet = false,C = 0.00001,ApproximationRank = 10,NumberOfIterations = 20
        };

        var est = mlContext.Recommendation().Trainers.MatrixFactorization(options);
        ITransformer model = est.Fit(data);

        var predictionengine = mlContext.Model.CreatePredictionEngine<ProductEntry,copurchase_prediction>(model);

        Console.WriteLine("Calculating the top 3 products for product 3...");
        var top5 = (from m in Enumerable.Range(1,262111)
                    let p = predictionengine.Predict(
                        new ProductEntry()
                        {
                            ProductID = 3,copurchaseProductID = (uint)m
                        })
                    orderby p.score descending
                    select (ProductID: m,score: p.score)).Take(10);
        foreach (var t in top5)
            Console.WriteLine($"  score:{t.score}\tProduct: {t.ProductID}");

        Console.ReadKey();

我遇到了有关“标签”的问题 这是课程：

public class copurchase_prediction
    {
        public float score { get; set; }
    }

    public class ProductEntry
    {
        [KeyType(count: 262111)]
        public float Label { get; set; }

        [KeyType(count: 262111)]
        public uint ProductID { get; set; }

        [KeyType(count: 262111)]
        public uint copurchaseProductID { get; set; }
    }

出现错误：

System.ArgumentOutOfRangeException: '用 KeyType 属性标记的成员标签，但似乎不是密钥类型的有效数据类型（参数'userType'）'

有什么想法吗？ 谢谢各位！

解决方法

删除 [KeyType(count: 262111)] 属性的 public float Label { get; set; } 注释

Label 不是键