public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo)
{
var options = TrainerExtensionUtil.CreateOptions <SdcaRegressionTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
return(mlContext.Regression.Trainers.Sdca(options));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo, IDataView validationSet)
{
var binaryTrainer = _binaryLearnerCatalogItem.CreateInstance(mlContext, sweepParams, columnInfo) as LinearSvmTrainer;
return(mlContext.MulticlassClassification.Trainers.OneVersusAll(binaryTrainer, labelColumnName: columnInfo.LabelColumnName));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo, IDataView validationSet)
{
var options = TrainerExtensionUtil.CreateOptions <LinearSvmTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
return(mlContext.BinaryClassification.Trainers.LinearSvm(options));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo)
{
var options = TrainerExtensionUtil.CreateOptions <SymbolicSgdLogisticRegressionBinaryTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
return(mlContext.BinaryClassification.Trainers.SymbolicSgdLogisticRegression(options));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo, IDataView validationSet)
{
var options = TrainerExtensionUtil.CreateOptions <OnlineGradientDescentTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
return(mlContext.Regression.Trainers.OnlineGradientDescent(options));
}
private static void ValidateTrainData(IDataView trainData, ColumnInformation columnInformation)
{
if (trainData == null)
{
throw new ArgumentNullException(nameof(trainData), "Training data cannot be null");
}
if (DatasetDimensionsUtil.IsDataViewEmpty(trainData))
{
throw new ArgumentException("Training data has 0 rows", nameof(trainData));
}
foreach (var column in trainData.Schema)
{
if (column.Name == DefaultColumnNames.Features && column.Type.GetItemType() != NumberDataViewType.Single)
{
throw new ArgumentException($"{DefaultColumnNames.Features} column must be of data type {NumberDataViewType.Single}", nameof(trainData));
}
if ((column.Name != columnInformation.LabelColumnName &&
column.Name != columnInformation.UserIdColumnName &&
column.Name != columnInformation.ItemIdColumnName &&
column.Name != columnInformation.GroupIdColumnName)
&&
column.Type.GetItemType() != BooleanDataViewType.Instance &&
column.Type.GetItemType() != NumberDataViewType.Single &&
column.Type.GetItemType() != TextDataViewType.Instance)
{
throw new ArgumentException($"Only supported feature column types are " +
$"{BooleanDataViewType.Instance}, {NumberDataViewType.Single}, and {TextDataViewType.Instance}. " +
$"Please change the feature column {column.Name} of type {column.Type} to one of " +
$"the supported types.", nameof(trainData));
}
}
}
private ExperimentResult <TMetrics> ExecuteTrainValidate(IDataView trainData,
ColumnInformation columnInfo,
IDataView validationData,
IEstimator <ITransformer> preFeaturizer,
IProgress <RunDetail <TMetrics> > progressHandler)
{
columnInfo = columnInfo ?? new ColumnInformation();
UserInputValidationUtil.ValidateExperimentExecuteArgs(trainData, columnInfo, validationData, _task);
// Apply pre-featurizer
ITransformer preprocessorTransform = null;
if (preFeaturizer != null)
{
preprocessorTransform = preFeaturizer.Fit(trainData);
trainData = preprocessorTransform.Transform(trainData);
validationData = preprocessorTransform.Transform(validationData);
}
var runner = new TrainValidateRunner <TMetrics>(Context, trainData, validationData, columnInfo.GroupIdColumnName, columnInfo.LabelColumnName, MetricsAgent,
preFeaturizer, preprocessorTransform, _logger);
var columns = DatasetColumnInfoUtil.GetDatasetColumnInfo(Context, trainData, columnInfo);
return(Execute(columnInfo, columns, preFeaturizer, progressHandler, runner));
}
private CrossValidationExperimentResult <TMetrics> ExecuteCrossVal(IDataView[] trainDatasets,
ColumnInformation columnInfo,
IDataView[] validationDatasets,
IEstimator <ITransformer> preFeaturizer,
IProgress <CrossValidationRunDetail <TMetrics> > progressHandler)
{
columnInfo = columnInfo ?? new ColumnInformation();
UserInputValidationUtil.ValidateExperimentExecuteArgs(trainDatasets[0], columnInfo, validationDatasets[0], _task);
// Apply pre-featurizer
ITransformer[] preprocessorTransforms = null;
(trainDatasets, validationDatasets, preprocessorTransforms) = ApplyPreFeaturizerCrossVal(trainDatasets, validationDatasets, preFeaturizer);
var runner = new CrossValRunner <TMetrics>(Context, trainDatasets, validationDatasets, MetricsAgent, preFeaturizer,
preprocessorTransforms, columnInfo.GroupIdColumnName, columnInfo.LabelColumnName, _logger);
var columns = DatasetColumnInfoUtil.GetDatasetColumnInfo(Context, trainDatasets[0], columnInfo);
// Execute experiment & get all pipelines run
var experiment = new Experiment <CrossValidationRunDetail <TMetrics>, TMetrics>(Context, _task, OptimizingMetricInfo, progressHandler,
Settings, MetricsAgent, _trainerAllowList, columns, runner, _logger);
var runDetails = experiment.Execute();
var bestRun = GetBestCrossValRun(runDetails);
var experimentResult = new CrossValidationExperimentResult <TMetrics>(runDetails, bestRun);
return(experimentResult);
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo)
{
var binaryTrainer = _binaryLearnerCatalogItem.CreateInstance(mlContext, sweepParams, columnInfo) as SymbolicSgdLogisticRegressionBinaryTrainer;
return(mlContext.MulticlassClassification.Trainers.OneVersusAll(binaryTrainer, labelColumnName: columnInfo.LabelColumnName));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo)
{
var options = TrainerExtensionUtil.CreateOptions <SdcaMaximumEntropyMulticlassTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
return(mlContext.MulticlassClassification.Trainers.SdcaMaximumEntropy(options));
}
/// <summary>
/// Infers information about the columns of a dataset in a file located at <paramref name="path"/>.
/// </summary>
/// <param name="path">Path to a dataset file.</param>
/// <param name="columnInformation">Column information for the dataset.</param>
/// <param name="separatorChar">The character used as separator between data elements in a row. If <see langword="null"/>, AutoML will try to infer this value.</param>
/// <param name="allowQuoting">Whether the file can contain columns defined by a quoted string. If <see langword="null"/>, AutoML will try to infer this value.</param>
/// <param name="allowSparse">Whether the file can contain numerical vectors in sparse format. If <see langword="null"/>, AutoML will try to infer this value.</param>
/// <param name="trimWhitespace">Whether trailing whitespace should be removed from dataset file lines.</param>
/// <param name="groupColumns">Whether to group together (when possible) original columns in the dataset file into vector columns in the resulting data structures. See <see cref="TextLoader.Range"/> for more information.</param>
/// <returns>Information inferred about the columns in the provided dataset.</returns>
/// <remarks>
/// Infers information about the name, data type, and purpose of each column.
/// The returned <see cref="ColumnInferenceResults.TextLoaderOptions" /> can be used to
/// instantiate a <see cref="TextLoader" />. The <see cref="TextLoader" /> can be used to
/// obtain an <see cref="IDataView"/> that can be fed into an AutoML experiment,
/// or used elsewhere in the ML.NET ecosystem (ie in <see cref="IEstimator{TTransformer}.Fit(IDataView)"/>.
/// The <see cref="ColumnInformation"/> contains the inferred purpose of each column in the dataset.
/// (For instance, is the column categorical, numeric, or text data? Should the column be ignored? Etc.)
/// The <see cref="ColumnInformation"/> can be inspected and modified (or kept as is) and used by an AutoML experiment.
/// </remarks>
public ColumnInferenceResults InferColumns(string path, ColumnInformation columnInformation, char?separatorChar = null, bool?allowQuoting = null,
bool?allowSparse = null, bool trimWhitespace = false, bool groupColumns = true)
{
columnInformation = columnInformation ?? new ColumnInformation();
UserInputValidationUtil.ValidateInferColumnsArgs(path, columnInformation);
return(ColumnInferenceApi.InferColumns(_context, path, columnInformation, separatorChar, allowQuoting, allowSparse, trimWhitespace, groupColumns));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo, IDataView validationSet)
{
var options = TrainerExtensionUtil.CreateOptions <Options>(null, columnInfo.LabelColumnName);
return(mlContext.MulticlassClassification.Trainers.ImageClassification(options));
}
public static void ValidateExperimentExecuteArgs(IDataView trainData, ColumnInformation columnInformation,
IDataView validationData, TaskKind task)
{
ValidateTrainData(trainData, columnInformation);
ValidateColumnInformation(trainData, columnInformation, task);
ValidateValidationData(trainData, validationData);
}
internal static ColumnPurpose?GetColumnPurpose(this ColumnInformation columnInfo, string columnName)
{
if (columnName == columnInfo.LabelColumnName)
{
return(ColumnPurpose.Label);
}
if (columnName == columnInfo.ExampleWeightColumnName)
{
return(ColumnPurpose.Weight);
}
if (columnName == columnInfo.SamplingKeyColumnName)
{
return(ColumnPurpose.SamplingKey);
}
if (columnInfo.CategoricalColumnNames.Contains(columnName))
{
return(ColumnPurpose.CategoricalFeature);
}
if (columnInfo.NumericColumnNames.Contains(columnName))
{
return(ColumnPurpose.NumericFeature);
}
if (columnInfo.TextColumnNames.Contains(columnName))
{
return(ColumnPurpose.TextFeature);
}
if (columnInfo.IgnoredColumnNames.Contains(columnName))
{
return(ColumnPurpose.Ignore);
}
if (columnName == columnInfo.UserIdColumnName)
{
return(ColumnPurpose.UserId);
}
if (columnName == columnInfo.GroupIdColumnName)
{
return(ColumnPurpose.GroupId);
}
if (columnName == columnInfo.ItemIdColumnName)
{
return(ColumnPurpose.ItemId);
}
if (columnInfo.ImagePathColumnNames.Contains(columnName))
{
return(ColumnPurpose.ImagePath);
}
return(null);
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo, IDataView validationSet)
{
var options = TrainerExtensionUtil.CreateOptions <FastTreeRankingTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
options.RowGroupColumnName = columnInfo.GroupIdColumnName;
return(mlContext.Ranking.Trainers.FastTree(options));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo, IDataView validationSet)
{
var options = TrainerExtensionUtil.CreateOptions <LbfgsMaximumEntropyMulticlassTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
options.ExampleWeightColumnName = columnInfo.ExampleWeightColumnName;
return(mlContext.MulticlassClassification.Trainers.LbfgsMaximumEntropy(options));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo, IDataView validationSet)
{
LightGbmRankingTrainer.Options options = TrainerExtensionUtil.CreateLightGbmOptions <LightGbmRankingTrainer.Options,
float, RankingPredictionTransformer <LightGbmRankingModelParameters>, LightGbmRankingModelParameters>(sweepParams, columnInfo);
options.RowGroupColumnName = columnInfo.GroupIdColumnName;
return(mlContext.Ranking.Trainers.LightGbm(options));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo, IDataView validationSet)
{
var options = TrainerExtensionUtil.CreateOptions <FastTreeBinaryTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
options.ExampleWeightColumnName = columnInfo.ExampleWeightColumnName;
return(mlContext.BinaryClassification.Trainers.FastTree(options));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo, IDataView validationSet)
{
var options = TrainerExtensionUtil.CreateOptions <LbfgsPoissonRegressionTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
options.ExampleWeightColumnName = columnInfo.ExampleWeightColumnName;
return(mlContext.Regression.Trainers.LbfgsPoissonRegression(options));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo)
{
var options = TrainerExtensionUtil.CreateOptions <SgdCalibratedTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
options.ExampleWeightColumnName = columnInfo.ExampleWeightColumnName;
return(mlContext.BinaryClassification.Trainers.SgdCalibrated(options));
}
public ITrainerEstimator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo)
{
var options = TrainerExtensionUtil.CreateOptions <FastTreeTweedieTrainer.Options>(sweepParams, columnInfo.LabelColumnName);
options.ExampleWeightColumnName = columnInfo.ExampleWeightColumnName;
return(mlContext.Regression.Trainers.FastTreeTweedie(options));
}
/// <summary>
/// Executes an AutoML experiment.
/// </summary>
/// <param name="trainData">The training data to be used by the AutoML experiment.</param>
/// <param name="validationData">The validation data to be used by the AutoML experiment.</param>
/// <param name="labelColumnName">The name of the label column.</param>
/// <param name="preFeaturizer">Pre-featurizer that AutoML will apply to the data during an
/// experiment. (The pre-featurizer will be fit only on the training data split to produce a
/// trained transform. Then, the trained transform will be applied to both the training
/// data split and corresponding validation data split.)</param>
/// <param name="progressHandler">A user-defined object that implements
/// the <see cref="IProgress{T}"/> interface. AutoML will invoke the method
/// <see cref="IProgress{T}.Report(T)"/> after each model it produces during the
/// course of the experiment.
/// </param>
/// <returns>The experiment result.</returns>
/// <remarks>
/// Depending on the size of your data, the AutoML experiment could take a long time to execute.
/// </remarks>
public ExperimentResult <TMetrics> Execute(IDataView trainData, IDataView validationData, string labelColumnName = DefaultColumnNames.Label, IEstimator <ITransformer> preFeaturizer = null, IProgress <RunDetail <TMetrics> > progressHandler = null)
{
var columnInformation = new ColumnInformation()
{
LabelColumnName = labelColumnName
};
return(Execute(trainData, validationData, columnInformation, preFeaturizer, progressHandler));
}
public override ExperimentResult <BinaryClassificationMetrics> Execute(IDataView trainData, IDataView validationData, string labelColumnName = "Label", IEstimator <ITransformer> preFeaturizer = null, IProgress <RunDetail <BinaryClassificationMetrics> > progressHandler = null)
{
var columnInformation = new ColumnInformation()
{
LabelColumnName = labelColumnName,
};
return(this.Execute(trainData, validationData, columnInformation, preFeaturizer, progressHandler));
}
/// <summary>
/// Executes an AutoML experiment.
/// </summary>
/// <param name="trainData">The training data to be used by the AutoML experiment.</param>
/// <param name="numberOfCVFolds">The number of cross validation folds into which the training data should be divided when fitting a model.</param>
/// <param name="columnInformation">Column information for the dataset.</param>
/// <param name="preFeaturizer">Pre-featurizer that AutoML will apply to the data during an
/// experiment. (The pre-featurizer will be fit only on the training data split to produce a
/// trained transform. Then, the trained transform will be applied to both the training
/// data split and corresponding validation data split.)</param>
/// <param name="progressHandler">A user-defined object that implements
/// the <see cref="IProgress{T}"/> interface. AutoML will invoke the method
/// <see cref="IProgress{T}.Report(T)"/> after each model it produces during the
/// course of the experiment.
/// </param>
/// <returns>The cross validation experiment result.</returns>
/// <remarks>
/// Depending on the size of your data, the AutoML experiment could take a long time to execute.
/// </remarks>
public CrossValidationExperimentResult <TMetrics> Execute(IDataView trainData, uint numberOfCVFolds,
ColumnInformation columnInformation = null, IEstimator <ITransformer> preFeaturizer = null,
IProgress <CrossValidationRunDetail <TMetrics> > progressHandler = null)
{
UserInputValidationUtil.ValidateNumberOfCVFoldsArg(numberOfCVFolds);
var splitResult = SplitUtil.CrossValSplit(Context, trainData, numberOfCVFolds, columnInformation?.SamplingKeyColumnName);
return(ExecuteCrossVal(splitResult.trainDatasets, columnInformation, splitResult.validationDatasets, preFeaturizer, progressHandler));
}
public ITrainerEsitmator CreateInstance(MLContext mlContext, IEnumerable <SweepableParam> sweepParams,
ColumnInformation columnInfo, IDataView validationSet)
{
var options = TrainerExtensionUtil.CreateOptions <MatrixFactorizationTrainer.Options>(sweepParams);
options.LabelColumnName = columnInfo.LabelColumnName;
options.MatrixColumnIndexColumnName = columnInfo.UserIdColumnName;
options.MatrixRowIndexColumnName = columnInfo.ItemIdColumnName;
return(mlContext.Recommendation().Trainers.MatrixFactorization(options));
}
/// <summary>
/// Executes an AutoML experiment.
/// </summary>
/// <param name="trainData">The training data to be used by the AutoML experiment.</param>
/// <param name="validationData">The validation data to be used by the AutoML experiment.</param>
/// <param name="columnInformation">Column information for the dataset.</param>
/// <param name="preFeaturizer">Pre-featurizer that AutoML will apply to the data during an
/// experiment. (The pre-featurizer will be fit only on the training data split to produce a
/// trained transform. Then, the trained transform will be applied to both the training
/// data split and corresponding validation data split.)</param>
/// <param name="progressHandler">A user-defined object that implements
/// the <see cref="IProgress{T}"/> interface. AutoML will invoke the method
/// <see cref="IProgress{T}.Report(T)"/> after each model it produces during the
/// course of the experiment.
/// </param>
/// <returns>The experiment result.</returns>
/// <remarks>
/// Depending on the size of your data, the AutoML experiment could take a long time to execute.
/// </remarks>
public virtual ExperimentResult <TMetrics> Execute(IDataView trainData, IDataView validationData,
ColumnInformation columnInformation, IEstimator <ITransformer> preFeaturizer = null,
IProgress <RunDetail <TMetrics> > progressHandler = null)
{
if (validationData == null)
{
return(Execute(trainData, columnInformation, preFeaturizer, progressHandler));
}
return(ExecuteTrainValidate(trainData, columnInformation, validationData, preFeaturizer, progressHandler));
}
public static ColumnInferenceResults InferColumns(MLContext context, string path, string labelColumn,
char?separatorChar, bool?allowQuotedStrings, bool?supportSparse, bool trimWhitespace, bool groupColumns)
{
var columnInfo = new ColumnInformation()
{
LabelColumnName = labelColumn
};
return(InferColumns(context, path, columnInfo, separatorChar, allowQuotedStrings, supportSparse, trimWhitespace, groupColumns));
}
public override CrossValidationExperimentResult <BinaryClassificationMetrics> Execute(IDataView trainData, uint numberOfCVFolds, string labelColumnName = "Label", string samplingKeyColumn = null, IEstimator <ITransformer> preFeaturizer = null, IProgress <CrossValidationRunDetail <BinaryClassificationMetrics> > progressHandler = null)
{
var columnInformation = new ColumnInformation()
{
LabelColumnName = labelColumnName,
SamplingKeyColumnName = samplingKeyColumn,
};
return(this.Execute(trainData, numberOfCVFolds, columnInformation, preFeaturizer, progressHandler));
}
public static ColumnInformation BuildColumnInfo(IDictionary <string, object> props)
{
var columnInfo = new ColumnInformation();
columnInfo.LabelColumnName = props[LabelColumn] as string;
props.TryGetValue(WeightColumn, out var weightColumn);
columnInfo.ExampleWeightColumnName = weightColumn as string;
return(columnInfo);
}
internal SuggestedTrainer(MLContext mlContext, ITrainerExtension trainerExtension,
ColumnInformation columnInfo,
ParameterSet hyperParamSet = null)
{
_mlContext = mlContext;
_trainerExtension = trainerExtension;
_columnInfo = columnInfo;
SweepParams = _trainerExtension.GetHyperparamSweepRanges();
TrainerName = TrainerExtensionCatalog.GetTrainerName(_trainerExtension);
SetHyperparamValues(hyperParamSet);
}
