internal SdcaRegressionTrainer(IHostEnvironment env, Arguments args, string featureColumn, string labelColumn, string weightColumn = null) : base(env, args, TrainerUtils.MakeR4ScalarLabel(labelColumn), TrainerUtils.MakeR4ScalarWeightColumn(weightColumn)) { Host.CheckValue(labelColumn, nameof(labelColumn)); Host.CheckValue(featureColumn, nameof(featureColumn)); _loss = args.LossFunction.CreateComponent(env); Loss = _loss; }
/// <summary> /// Initializes a new instance of <see cref="PoissonRegression"/> /// </summary> /// <param name="env">The environment to use.</param> /// <param name="labelColumn">The name of the label column.</param> /// <param name="featureColumn">The name of the feature column.</param> /// <param name="weightColumn">The name for the example weight column.</param> /// <param name="enforceNoNegativity">Enforce non-negative weights.</param> /// <param name="l1Weight">Weight of L1 regularizer term.</param> /// <param name="l2Weight">Weight of L2 regularizer term.</param> /// <param name="memorySize">Memory size for <see cref="LogisticRegression"/>. Lower=faster, less accurate.</param> /// <param name="optimizationTolerance">Threshold for optimizer convergence.</param> /// <param name="advancedSettings">A delegate to apply all the advanced arguments to the algorithm.</param> public PoissonRegression(IHostEnvironment env, string featureColumn, string labelColumn, string weightColumn = null, float l1Weight = Arguments.Defaults.L1Weight, float l2Weight = Arguments.Defaults.L2Weight, float optimizationTolerance = Arguments.Defaults.OptTol, int memorySize = Arguments.Defaults.MemorySize, bool enforceNoNegativity = Arguments.Defaults.EnforceNonNegativity, Action <Arguments> advancedSettings = null) : base(env, featureColumn, TrainerUtils.MakeR4ScalarLabel(labelColumn), weightColumn, advancedSettings, l1Weight, l2Weight, optimizationTolerance, memorySize, enforceNoNegativity) { Host.CheckNonEmpty(featureColumn, nameof(featureColumn)); Host.CheckNonEmpty(labelColumn, nameof(labelColumn)); }
/// <summary> /// Initializes a new instance of <see cref="SdcaRegressionTrainer"/> /// </summary> /// <param name="env">The environment to use.</param> /// <param name="labelColumn">The label, or dependent variable.</param> /// <param name="featureColumn">The features, or independent variables.</param> /// <param name="weights">The optional example weights.</param> /// <param name="loss">The custom loss.</param> /// <param name="l2Const">The L2 regularization hyperparameter.</param> /// <param name="l1Threshold">The L1 regularization hyperparameter. Higher values will tend to lead to more sparse model.</param> /// <param name="maxIterations">The maximum number of passes to perform over the data.</param> /// <param name="advancedSettings">A delegate to set more settings. /// The settings here will override the ones provided in the direct method signature, /// if both are present and have different values. /// The columns names, however need to be provided directly, not through the <paramref name="advancedSettings"/>.</param> public SdcaRegressionTrainer(IHostEnvironment env, string labelColumn = DefaultColumnNames.Label, string featureColumn = DefaultColumnNames.Features, string weights = null, ISupportSdcaRegressionLoss loss = null, float?l2Const = null, float?l1Threshold = null, int?maxIterations = null, Action <Arguments> advancedSettings = null) : base(env, featureColumn, TrainerUtils.MakeR4ScalarLabel(labelColumn), TrainerUtils.MakeR4ScalarWeightColumn(weights), advancedSettings, l2Const, l1Threshold, maxIterations) { Host.CheckNonEmpty(featureColumn, nameof(featureColumn)); Host.CheckNonEmpty(labelColumn, nameof(labelColumn)); _loss = loss ?? Args.LossFunction.CreateComponent(env); Loss = _loss; }
/// <summary> /// Initializes a new instance of <see cref="PoissonRegression"/> /// </summary> internal PoissonRegression(IHostEnvironment env, Arguments args) : base(env, args, TrainerUtils.MakeR4ScalarLabel(args.LabelColumn)) { }