Package org.apache.spark.ml.feature

Class OneHotEncoderModel

Object
org.apache.spark.ml.PipelineStage
org.apache.spark.ml.Transformer
org.apache.spark.ml.Model<OneHotEncoderModel>
org.apache.spark.ml.feature.OneHotEncoderModel
All Implemented Interfaces:
Serializable, org.apache.spark.internal.Logging, OneHotEncoderBase, Params, HasHandleInvalid, HasInputCol, HasInputCols, HasOutputCol, HasOutputCols, Identifiable, MLWritable
public class OneHotEncoderModel extends Model<OneHotEncoderModel> implements OneHotEncoderBase, MLWritable
param: categorySizes Original number of categories for each feature being encoded. The array contains one value for each input column, in order.
See Also:

  • Method Details

    • read

      public static MLReader<OneHotEncoderModel> read()

    • load

      public static OneHotEncoderModel load(String path)

    • handleInvalid

      public Param<String> handleInvalid()
      Description copied from interface: OneHotEncoderBase
      Param for how to handle invalid data during transform(). Options are 'keep' (invalid data presented as an extra categorical feature) or 'error' (throw an error). Note that this Param is only used during transform; during fitting, invalid data will result in an error. Default: "error"
      Specified by:
      handleInvalid in interface HasHandleInvalid
      Specified by:
      handleInvalid in interface OneHotEncoderBase
      Returns:
      (undocumented)

    • dropLast

      public final BooleanParam dropLast()
      Description copied from interface: OneHotEncoderBase
      Whether to drop the last category in the encoded vector (default: true)
      Specified by:
      dropLast in interface OneHotEncoderBase
      Returns:
      (undocumented)

    • outputCols

      public final StringArrayParam outputCols()
      Description copied from interface: HasOutputCols
      Param for output column names.
      Specified by:
      outputCols in interface HasOutputCols
      Returns:
      (undocumented)

    • outputCol

      public final Param<String> outputCol()
      Description copied from interface: HasOutputCol
      Param for output column name.
      Specified by:
      outputCol in interface HasOutputCol
      Returns:
      (undocumented)

    • inputCols

      public final StringArrayParam inputCols()
      Description copied from interface: HasInputCols
      Param for input column names.
      Specified by:
      inputCols in interface HasInputCols
      Returns:
      (undocumented)

    • inputCol

      public final Param<String> inputCol()
      Description copied from interface: HasInputCol
      Param for input column name.
      Specified by:
      inputCol in interface HasInputCol
      Returns:
      (undocumented)

    • uid

      public String uid()
      Description copied from interface: Identifiable
      An immutable unique ID for the object and its derivatives.
      Specified by:
      uid in interface Identifiable
      Returns:
      (undocumented)

    • categorySizes

      public int[] categorySizes()

    • setInputCol

      public OneHotEncoderModel setInputCol(String value)

    • setOutputCol

      public OneHotEncoderModel setOutputCol(String value)

    • setInputCols

      public OneHotEncoderModel setInputCols(String[] values)

    • setOutputCols

      public OneHotEncoderModel setOutputCols(String[] values)

    • setDropLast

      public OneHotEncoderModel setDropLast(boolean value)

    • setHandleInvalid

      public OneHotEncoderModel setHandleInvalid(String value)

    • transformSchema

      public StructType transformSchema(StructType schema)
      Description copied from class: PipelineStage
      Check transform validity and derive the output schema from the input schema.

      We check validity for interactions between parameters during transformSchema and raise an exception if any parameter value is invalid. Parameter value checks which do not depend on other parameters are handled by Param.validate().

      Typical implementation should first conduct verification on schema change and parameter validity, including complex parameter interaction checks.

      Specified by:
      transformSchema in class PipelineStage
      Parameters:
      schema - (undocumented)
      Returns:
      (undocumented)

    • transform

      public Dataset<Row> transform(Dataset<?> dataset)
      Description copied from class: Transformer
      Transforms the input dataset.
      Specified by:
      transform in class Transformer
      Parameters:
      dataset - (undocumented)
      Returns:
      (undocumented)

    • copy

      public OneHotEncoderModel copy(ParamMap extra)
      Description copied from interface: Params
      Creates a copy of this instance with the same UID and some extra params. Subclasses should implement this method and set the return type properly. See defaultCopy().
      Specified by:
      copy in interface Params
      Specified by:
      copy in class Model<OneHotEncoderModel>
      Parameters:
      extra - (undocumented)
      Returns:
      (undocumented)

    • write

      public MLWriter write()
      Description copied from interface: MLWritable
      Returns an MLWriter instance for this ML instance.
      Specified by:
      write in interface MLWritable
      Returns:
      (undocumented)

    • toString

      public String toString()
      Specified by:
      toString in interface Identifiable
      Overrides:
      toString in class Object