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

java.lang.Object
  org.knime.base.data.aggregation.AggregationOperator
      org.knime.base.data.aggregation.numerical.VarianceOperator
          org.knime.base.data.aggregation.numerical.StdDeviationOperator

All Implemented Interfaces:

Comparable<AggregationMethod>, AggregationMethod

public class StdDeviationOperator
extends VarianceOperator

Returns the standard deviation per group.

Author:

Tobias Koetter, University of Konstanz

Constructor Summary

StdDeviationOperator(GlobalSettings globalSettings, OperatorColumnSettings opColSettings)
Constructor for class StdDeviationOperator.

Method Summary

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

Methods inherited from class org.knime.base.data.aggregation.numerical.VarianceOperator

computeInternal, getDataType, 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

StdDeviationOperator

public StdDeviationOperator(GlobalSettings globalSettings,
                            OperatorColumnSettings opColSettings)

Constructor for class StdDeviationOperator.

Parameters:

globalSettings - the global settings

opColSettings - the operator column specific settings

Method Detail

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 VarianceOperator

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 VarianceOperator

Returns:

the result DataCell

getDescription

public String getDescription()

Specified by:

getDescription in interface AggregationMethod

Overrides:

getDescription in class VarianceOperator

Returns:

a description that explains the used aggregation method to the user