org.knime.base.data.aggregation.numerical
Class MedianOperator

java.lang.Object
  org.knime.base.data.aggregation.AggregationOperator
      org.knime.base.data.aggregation.general.ListCellOperator
          org.knime.base.data.aggregation.general.SortedListCellOperator
              org.knime.base.data.aggregation.numerical.MedianOperator

All Implemented Interfaces:

Comparable<AggregationMethod>, AggregationMethod

public class MedianOperator
extends SortedListCellOperator

Computes the median of a list of numbers.

Author:

Tobias Koetter, University of Konstanz

Constructor Summary

	MedianOperator(GlobalSettings globalSettings, OperatorColumnSettings opColSettings) Constructor for class MedianOperator.
protected	MedianOperator(OperatorData operatorData, GlobalSettings globalSettings, OperatorColumnSettings opColSettings) Constructor for class MedianOperator.

Method Summary

AggregationOperator	createInstance(GlobalSettings globalSettings, OperatorColumnSettings opColSettings) Creates a new instance of this operator.
protected DataType	getDataType(DataType origType)
String	getDescription()
protected DataCell	getResultInternal()

Methods inherited from class org.knime.base.data.aggregation.general.SortedListCellOperator

sortCells

Methods inherited from class org.knime.base.data.aggregation.general.ListCellOperator

computeInternal, getCells, resetInternal

Methods inherited from class org.knime.base.data.aggregation.AggregationOperator

compareTo, compute, createColumnSpec, createOperator, getColumnLabel, getGlobalSettings, getId, getLabel, getMaxUniqueValues, getOperatorData, getResult, getSkipMessage, getSupportedType, getSupportedTypeLabel, getValueDelimiter, inclMissingCells, isCompatible, isCompatible, isSkipped, isUsesLimit, keepColumnSpec, reset, setSkipMessage, setSkipped, supportsMissingValueOption, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MedianOperator

protected MedianOperator(OperatorData operatorData,
                         GlobalSettings globalSettings,
                         OperatorColumnSettings opColSettings)

Constructor for class MedianOperator.

Parameters:

operatorData - the operator data

globalSettings - the global settings

opColSettings - the operator column specific settings

MedianOperator

public MedianOperator(GlobalSettings globalSettings,
                      OperatorColumnSettings opColSettings)

Constructor for class MedianOperator.

Parameters:

globalSettings - the global settings

opColSettings - the operator column specific settings

Method Detail

getDataType

protected DataType getDataType(DataType origType)

Overrides:

getDataType in class ListCellOperator

Parameters:

origType - the DataType of the original column to aggregate

Returns:

the DataType of the aggregation result

createInstance

public AggregationOperator createInstance(GlobalSettings globalSettings,
                                          OperatorColumnSettings opColSettings)

Creates a new instance of this operator. A new instance is created for each column.

Overrides:

createInstance in class SortedListCellOperator

Parameters:

globalSettings - the global settings

opColSettings - the operator column specific settings

Returns:

a new instance of this operator

getResultInternal

protected DataCell getResultInternal()

Overrides:

getResultInternal in class SortedListCellOperator

Returns:

the result DataCell

getDescription

public String getDescription()

Specified by:

getDescription in interface AggregationMethod

Overrides:

getDescription in class SortedListCellOperator

Returns:

a description that explains the used aggregation method to the user