Examples of cascading.pattern.datafield.CategoricalDataField

cascading.pattern.datafield.CategoricalDataField
Class CategoricalDataField represent a field with a fixed set of possible values.
For example, if the field name is {@code SIZE}, it could have three possible categories, {@code small}, {@code medium}, and {@code large}.
Order of categories is retained so that indexes into the internal list of categories can be used to speed up some operations.

    {
    DataType dataType = dataField.getDataType();
    Type type = DataTypes.getPmmlToType( dataType );


    if( type == String.class )
      return new CategoricalDataField( name, type, asStrings( dataField.getValues() ) );


    String message = String.format( "unsupported data type: %s", dataType );
    LOG.error( message );


    throw new PatternException( message );

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      throw new IllegalArgumentException( "predicted field does not exist: " + fieldName );


    DataField dataField = dictionary.get( fieldName );


    if( dataField instanceof ContinuousDataField )
      dataField = new CategoricalDataField( fieldName, String.class, categories );
    else
      dataField = new CategoricalDataField( (CategoricalDataField) dataField, categories );


    dictionary.put( fieldName, dataField );
    }

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    for( Comparable field : fields )
      {
      if( field instanceof Number )
        throw new IllegalArgumentException( "all fields must be names, not ordinal, got: " + field );


      dataFields.add( new CategoricalDataField( (String) field, fields.getType( field ), categories[ fields.getPos( field ) ] ) );
      }


    return dataFields;
    }

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Related Classes of cascading.pattern.datafield.CategoricalDataField

cascading.pattern.model.ModelSchema

cascading.pattern.pmml.DataFields

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