/// <summary>
/// Create a list of <see cref="SweepableEstimator"/> for featurizing numeric columns.
/// </summary>
/// <param name="outputColumnNames">output column names.</param>
/// <param name="inputColumnNames">input column names.</param>
internal SweepableEstimator[] NumericFeaturizer(string[] outputColumnNames, string[] inputColumnNames)
{
Contracts.CheckValue(inputColumnNames, nameof(inputColumnNames));
Contracts.CheckValue(outputColumnNames, nameof(outputColumnNames));
Contracts.Check(outputColumnNames.Count() == inputColumnNames.Count() && outputColumnNames.Count() > 0, "outputColumnNames and inputColumnNames must have the same length and greater than 0");
var replaceMissingValueOption = new ReplaceMissingValueOption
{
InputColumnNames = inputColumnNames,
OutputColumnNames = outputColumnNames,
};
return(new[] { SweepableEstimatorFactory.CreateReplaceMissingValues(replaceMissingValueOption) });
}
public override IEstimator <ITransformer> BuildFromOption(MLContext context, ReplaceMissingValueOption param)
{
var inputOutputPairs = AutoMlUtils.CreateInputOutputColumnPairsFromStrings(param.InputColumnNames, param.OutputColumnNames);
return(context.Transforms.ReplaceMissingValues(inputOutputPairs));
}
