/// <summary> /// Predict a target using a linear binary classification model trained with the SDCA trainer, and a custom loss. /// Note that because we cannot be sure that all loss functions will produce naturally calibrated outputs, setting /// a custom loss function will not produce a calibrated probability column. /// </summary> /// <param name="catalog">The binary classification catalog trainer object.</param> /// <param name="label">The label, or dependent variable.</param> /// <param name="features">The features, or independent variables.</param> /// <param name="lossFunction">The custom loss.</param> /// <param name="weights">The optional example weights.</param> /// <param name="options">Advanced arguments to the algorithm.</param> /// <param name="onFit">A delegate that is called every time the /// <see cref="Estimator{TInShape, TOutShape, TTransformer}.Fit(DataView{TInShape})"/> method is called on the /// <see cref="Estimator{TInShape, TOutShape, TTransformer}"/> instance created out of this. This delegate will receive /// the linear model that was trained, as well as the calibrator on top of that model. Note that this action cannot change the /// result in any way; it is only a way for the caller to be informed about what was learnt.</param> /// <returns>The set of output columns including in order the predicted binary classification score (which will range /// from negative to positive infinity), and the predicted label.</returns> public static (Scalar <float> score, Scalar <bool> predictedLabel) SdcaNonCalibrated( this BinaryClassificationCatalog.BinaryClassificationTrainers catalog, Scalar <bool> label, Vector <float> features, Scalar <float> weights, ISupportSdcaClassificationLoss lossFunction, SdcaNonCalibratedBinaryTrainer.Options options, Action <LinearBinaryModelParameters> onFit = null) { Contracts.CheckValue(label, nameof(label)); Contracts.CheckValue(features, nameof(features)); Contracts.CheckValueOrNull(weights); Contracts.CheckValueOrNull(options); Contracts.CheckValueOrNull(onFit); var rec = new TrainerEstimatorReconciler.BinaryClassifierNoCalibration( (env, labelName, featuresName, weightsName) => { options.FeatureColumnName = featuresName; options.LabelColumnName = labelName; var trainer = new SdcaNonCalibratedBinaryTrainer(env, options); if (onFit != null) { return(trainer.WithOnFitDelegate(trans => { onFit(trans.Model); })); } return(trainer); }, label, features, weights); return(rec.Output); }
/// <summary> /// Predict a target using a linear binary classification model trained with the AveragedPerceptron trainer, and a custom loss. /// </summary> /// <param name="catalog">The binary classification catalog trainer object.</param> /// <param name="label">The label, or dependent variable.</param> /// <param name="features">The features, or independent variables.</param> /// <param name="lossFunction">The custom loss.</param> /// <param name="weights">The optional example weights.</param> /// <param name="learningRate">The learning Rate.</param> /// <param name="decreaseLearningRate">Decrease learning rate as iterations progress.</param> /// <param name="l2Regularization">L2 regularization weight.</param> /// <param name="numIterations">Number of training iterations through the data.</param> /// <param name="onFit">A delegate that is called every time the /// <see cref="Estimator{TInShape, TOutShape, TTransformer}.Fit(DataView{TInShape})"/> method is called on the /// <see cref="Estimator{TInShape, TOutShape, TTransformer}"/> instance created out of this. This delegate will receive /// the linear model that was trained, as well as the calibrator on top of that model. Note that this action cannot change the /// result in any way; it is only a way for the caller to be informed about what was learnt.</param> /// <returns>The set of output columns including in order the predicted binary classification score (which will range /// from negative to positive infinity), and the predicted label.</returns> /// <seealso cref="AveragedPerceptronTrainer"/>. /// <example> /// <format type="text/markdown"> /// <![CDATA[ /// [!code-csharp[AveragedPerceptron](~/../docs/samples/docs/samples/Microsoft.ML.Samples/Static/AveragedPerceptronBinaryClassification.cs)] /// ]]></format> /// </example> public static (Scalar <float> score, Scalar <bool> predictedLabel) AveragedPerceptron( this BinaryClassificationCatalog.BinaryClassificationTrainers catalog, Scalar <bool> label, Vector <float> features, Scalar <float> weights = null, IClassificationLoss lossFunction = null, float learningRate = AveragedLinearOptions.AveragedDefault.LearningRate, bool decreaseLearningRate = AveragedLinearOptions.AveragedDefault.DecreaseLearningRate, float l2Regularization = AveragedLinearOptions.AveragedDefault.L2Regularization, int numIterations = AveragedLinearOptions.AveragedDefault.NumberOfIterations, Action <LinearBinaryModelParameters> onFit = null ) { OnlineLinearStaticUtils.CheckUserParams(label, features, weights, learningRate, l2Regularization, numIterations, onFit); bool hasProbs = lossFunction is LogLoss; var rec = new TrainerEstimatorReconciler.BinaryClassifierNoCalibration( (env, labelName, featuresName, weightsName) => { var trainer = new AveragedPerceptronTrainer(env, labelName, featuresName, lossFunction, learningRate, decreaseLearningRate, l2Regularization, numIterations); if (onFit != null) { return(trainer.WithOnFitDelegate(trans => onFit(trans.Model))); } else { return(trainer); } }, label, features, weights); return(rec.Output); }
/// <summary> /// Predict a target using a linear binary classification model trained with the SDCA trainer, and a custom loss. /// Note that because we cannot be sure that all loss functions will produce naturally calibrated outputs, setting /// a custom loss function will not produce a calibrated probability column. /// </summary> /// <param name="catalog">The binary classification catalog trainer object.</param> /// <param name="label">The label, or dependent variable.</param> /// <param name="features">The features, or independent variables.</param> /// <param name="lossFunction">The custom loss.</param> /// <param name="weights">The optional example weights.</param> /// <param name="l2Regularization">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="numberOfIterations">The maximum number of passes to perform over the data.</param> /// <param name="onFit">A delegate that is called every time the /// <see cref="Estimator{TInShape, TOutShape, TTransformer}.Fit(DataView{TInShape})"/> method is called on the /// <see cref="Estimator{TInShape, TOutShape, TTransformer}"/> instance created out of this. This delegate will receive /// the linear model that was trained, as well as the calibrator on top of that model. Note that this action cannot change the /// result in any way; it is only a way for the caller to be informed about what was learnt.</param> /// <returns>The set of output columns including in order the predicted binary classification score (which will range /// from negative to positive infinity), and the predicted label.</returns> public static (Scalar <float> score, Scalar <bool> predictedLabel) SdcaNonCalibrated( this BinaryClassificationCatalog.BinaryClassificationTrainers catalog, Scalar <bool> label, Vector <float> features, ISupportSdcaClassificationLoss lossFunction, Scalar <float> weights = null, float?l2Regularization = null, float?l1Threshold = null, int?numberOfIterations = null, Action <LinearBinaryModelParameters> onFit = null) { Contracts.CheckValue(label, nameof(label)); Contracts.CheckValue(features, nameof(features)); Contracts.CheckValue(lossFunction, nameof(lossFunction)); Contracts.CheckValueOrNull(weights); Contracts.CheckParam(!(l2Regularization < 0), nameof(l2Regularization), "Must not be negative, if specified."); Contracts.CheckParam(!(l1Threshold < 0), nameof(l1Threshold), "Must not be negative, if specified."); Contracts.CheckParam(!(numberOfIterations < 1), nameof(numberOfIterations), "Must be positive if specified"); Contracts.CheckValueOrNull(onFit); var rec = new TrainerEstimatorReconciler.BinaryClassifierNoCalibration( (env, labelName, featuresName, weightsName) => { var trainer = new SdcaNonCalibratedBinaryTrainer(env, labelName, featuresName, weightsName, lossFunction, l2Regularization, l1Threshold, numberOfIterations); if (onFit != null) { return(trainer.WithOnFitDelegate(trans => { onFit(trans.Model); })); } return(trainer); }, label, features, weights); return(rec.Output); }
/// <summary> /// Predict a target using a linear classification model trained with the <see cref="SgdNonCalibratedTrainer"/> trainer. /// </summary> /// <param name="catalog">The binary classification catalog trainer object.</param> /// <param name="label">The name of the label column.</param> /// <param name="features">The name of the feature column.</param> /// <param name="weights">The name for the example weight column.</param> /// <param name="options">Advanced arguments to the algorithm.</param> /// <param name="onFit">A delegate that is called every time the /// <see cref="Estimator{TTupleInShape, TTupleOutShape, TTransformer}.Fit(DataView{TTupleInShape})"/> method is called on the /// <see cref="Estimator{TTupleInShape, TTupleOutShape, TTransformer}"/> instance created out of this. This delegate will receive /// the linear model that was trained. Note that this action cannot change the result in any way; it is only a way for the caller to /// be informed about what was learnt.</param> /// <returns>The predicted output.</returns> public static (Scalar <float> score, Scalar <bool> predictedLabel) StochasticGradientDescentNonCalibratedClassificationTrainer( this BinaryClassificationCatalog.BinaryClassificationTrainers catalog, Scalar <bool> label, Vector <float> features, Scalar <float> weights, SgdNonCalibratedTrainer.Options options, Action <LinearBinaryModelParameters> onFit = null) { var rec = new TrainerEstimatorReconciler.BinaryClassifierNoCalibration( (env, labelName, featuresName, weightsName) => { options.FeatureColumnName = featuresName; options.LabelColumnName = labelName; options.ExampleWeightColumnName = weightsName; var trainer = new SgdNonCalibratedTrainer(env, options); if (onFit != null) { return(trainer.WithOnFitDelegate(trans => onFit(trans.Model))); } return(trainer); }, label, features, weights); return(rec.Output); }
/// <summary> /// Predict a target using a linear classification model trained with the <see cref="SgdNonCalibratedTrainer"/> trainer. /// </summary> /// <param name="catalog">The binary classification catalog trainer object.</param> /// <param name="label">The name of the label column.</param> /// <param name="features">The name of the feature column.</param> /// <param name="weights">The name for the example weight column.</param> /// <param name="numberOfIterations">The maximum number of iterations; set to 1 to simulate online learning.</param> /// <param name="learningRate">The initial learning rate used by SGD.</param> /// <param name="l2Regularization">The L2 weight for <a href='https://en.wikipedia.org/wiki/Regularization_(mathematics)'>regularization</a>.</param> /// <param name="lossFunction">The loss function to use.</param> /// <param name="onFit">A delegate that is called every time the /// <see cref="Estimator{TTupleInShape, TTupleOutShape, TTransformer}.Fit(DataView{TTupleInShape})"/> method is called on the /// <see cref="Estimator{TTupleInShape, TTupleOutShape, TTransformer}"/> instance created out of this. This delegate will receive /// the linear model that was trained. Note that this action cannot change the result in any way; it is only a way for the caller to /// be informed about what was learnt.</param> /// <returns>The predicted output.</returns> public static (Scalar <float> score, Scalar <bool> predictedLabel) StochasticGradientDescentNonCalibratedClassificationTrainer( this BinaryClassificationCatalog.BinaryClassificationTrainers catalog, Scalar <bool> label, Vector <float> features, Scalar <float> weights = null, int numberOfIterations = SgdNonCalibratedTrainer.Options.Defaults.NumberOfIterations, double learningRate = SgdNonCalibratedTrainer.Options.Defaults.LearningRate, float l2Regularization = SgdNonCalibratedTrainer.Options.Defaults.L2Regularization, IClassificationLoss lossFunction = null, Action <LinearBinaryModelParameters> onFit = null) { var rec = new TrainerEstimatorReconciler.BinaryClassifierNoCalibration( (env, labelName, featuresName, weightsName) => { var trainer = new SgdNonCalibratedTrainer(env, labelName, featuresName, weightsName, numberOfIterations, learningRate, l2Regularization, lossFunction); if (onFit != null) { return(trainer.WithOnFitDelegate(trans => onFit(trans.Model))); } return(trainer); }, label, features, weights); return(rec.Output); }
/// <summary> /// Predict a target using a linear binary classification model trained with the AveragedPerceptron trainer, and a custom loss. /// </summary> /// <param name="ctx">The binary classification context trainer object.</param> /// <param name="label">The label, or dependent variable.</param> /// <param name="features">The features, or independent variables.</param> /// <param name="lossFunction">The custom loss.</param> /// <param name="weights">The optional example weights.</param> /// <param name="learningRate">The learning Rate.</param> /// <param name="decreaseLearningRate">Decrease learning rate as iterations progress.</param> /// <param name="l2RegularizerWeight">L2 regularization weight.</param> /// <param name="numIterations">Number of training iterations through the data.</param> /// <param name="onFit">A delegate that is called every time the /// <see cref="Estimator{TTupleInShape, TTupleOutShape, TTransformer}.Fit(DataView{TTupleInShape})"/> method is called on the /// <see cref="Estimator{TTupleInShape, TTupleOutShape, TTransformer}"/> instance created out of this. This delegate will receive /// the linear model that was trained, as well as the calibrator on top of that model. Note that this action cannot change the /// result in any way; it is only a way for the caller to be informed about what was learnt.</param> /// <returns>The set of output columns including in order the predicted binary classification score (which will range /// from negative to positive infinity), and the predicted label.</returns> /// <seealso cref="AveragedPerceptronTrainer"/>. public static (Scalar <float> score, Scalar <bool> predictedLabel) AveragedPerceptron( this BinaryClassificationContext.BinaryClassificationTrainers ctx, IClassificationLoss lossFunction, Scalar <bool> label, Vector <float> features, Scalar <float> weights = null, float learningRate = AveragedLinearArguments.AveragedDefaultArgs.LearningRate, bool decreaseLearningRate = AveragedLinearArguments.AveragedDefaultArgs.DecreaseLearningRate, float l2RegularizerWeight = AveragedLinearArguments.AveragedDefaultArgs.L2RegularizerWeight, int numIterations = AveragedLinearArguments.AveragedDefaultArgs.NumIterations, Action <LinearBinaryPredictor> onFit = null ) { OnlineLinearStaticUtils.CheckUserParams(label, features, weights, learningRate, l2RegularizerWeight, numIterations, onFit); bool hasProbs = lossFunction is HingeLoss; var args = new AveragedPerceptronTrainer.Arguments() { LearningRate = learningRate, DecreaseLearningRate = decreaseLearningRate, L2RegularizerWeight = l2RegularizerWeight, NumIterations = numIterations }; if (lossFunction != null) { args.LossFunction = new TrivialClassificationLossFactory(lossFunction); } var rec = new TrainerEstimatorReconciler.BinaryClassifierNoCalibration( (env, labelName, featuresName, weightsName) => { args.FeatureColumn = featuresName; args.LabelColumn = labelName; args.InitialWeights = weightsName; var trainer = new AveragedPerceptronTrainer(env, args); if (onFit != null) { return(trainer.WithOnFitDelegate(trans => onFit(trans.Model))); } else { return(trainer); } }, label, features, weights, hasProbs); return(rec.Output); }
/// <summary> /// Predict a target using a linear binary classification model trained with the AveragedPerceptron trainer, and a custom loss. /// </summary> /// <param name="catalog">The binary classification catalog trainer object.</param> /// <param name="label">The label, or dependent variable.</param> /// <param name="features">The features, or independent variables.</param> /// <param name="lossFunction">The custom loss.</param> /// <param name="weights">The optional example weights.</param> /// <param name="options">Advanced arguments to the algorithm.</param> /// <param name="onFit">A delegate that is called every time the /// <see cref="Estimator{TInShape, TOutShape, TTransformer}.Fit(DataView{TInShape})"/> method is called on the /// <see cref="Estimator{TInShape, TOutShape, TTransformer}"/> instance created out of this. This delegate will receive /// the linear model that was trained, as well as the calibrator on top of that model. Note that this action cannot change the /// result in any way; it is only a way for the caller to be informed about what was learnt.</param> /// <returns>The set of output columns including in order the predicted binary classification score (which will range /// from negative to positive infinity), and the predicted label.</returns> /// <seealso cref="AveragedPerceptronTrainer"/>. /// <example> /// <format type="text/markdown"> /// <![CDATA[ /// [!code-csharp[AveragedPerceptron](~/../docs/samples/docs/samples/Microsoft.ML.Samples/Static/AveragedPerceptronBinaryClassification.cs)] /// ]]></format> /// </example> public static (Scalar <float> score, Scalar <bool> predictedLabel) AveragedPerceptron( this BinaryClassificationCatalog.BinaryClassificationTrainers catalog, Scalar <bool> label, Vector <float> features, Scalar <float> weights, IClassificationLoss lossFunction, AveragedPerceptronTrainer.Options options, Action <LinearBinaryModelParameters> onFit = null ) { Contracts.CheckValue(label, nameof(label)); Contracts.CheckValue(features, nameof(features)); Contracts.CheckValueOrNull(weights); Contracts.CheckValueOrNull(options); Contracts.CheckValueOrNull(onFit); bool hasProbs = lossFunction is LogLoss; var rec = new TrainerEstimatorReconciler.BinaryClassifierNoCalibration( (env, labelName, featuresName, weightsName) => { options.LabelColumn = labelName; options.FeatureColumn = featuresName; options.InitialWeights = weightsName; var trainer = new AveragedPerceptronTrainer(env, options); if (onFit != null) { return(trainer.WithOnFitDelegate(trans => onFit(trans.Model))); } else { return(trainer); } }, label, features, weights, hasProbs); return(rec.Output); }