edu.udo.cs.miningmart.operator
Class AssignStochasticValue

java.lang.Object
  extended byedu.udo.cs.miningmart.operator.ExecutableOperator
      extended byedu.udo.cs.miningmart.operator.FeatureConstruction
          extended byedu.udo.cs.miningmart.operator.MissingValues
              extended byedu.udo.cs.miningmart.operator.AssignStochasticValue

public class AssignStochasticValue
extends MissingValues

This operator uses statistical information about the distribution of the values in the target attribute to randomly choose replacements for the missing values such that the distribution is not expected to change.

Version:
$Id: AssignStochasticValue.java,v 1.5 2006/04/11 14:10:12 euler Exp $
Author:
Timm Euler

Constructor Summary
AssignStochasticValue()
           
 
Method Summary
 java.lang.String generateValueForOp(Column columnWithMissingValues)
          The abstract method to be implemented by the subclasses.
 
Methods inherited from class edu.udo.cs.miningmart.operator.MissingValues
generateSQL
 
Methods inherited from class edu.udo.cs.miningmart.operator.FeatureConstruction
compileStatement, createStatement, estimateStatistics, execute, generateColumnForOp, getCurrentLoopNumber, getTheInputConcept, getTheOutputAttribute, getTheOutputAttribute, getTheTargetAttribute, getTheTargetAttribute, load, writeResults
 
Methods inherited from class edu.udo.cs.miningmart.operator.ExecutableOperator
autoPrint, checkConditions, doPrint, doPrint, executeBusinessSingleValueSqlRead, executeBusinessSingleValueSqlReadL, executeBusinessSqlRead, executeBusinessSqlWrite, executeM4SingleValueSqlRead, executeM4SingleValueSqlReadL, executeM4SqlRead, executeM4SqlWrite, getArtificalColumnName, getBusinessDbms, getHighestLoopNr, getM4Db, getM4Dbms, getM4ObjectFromCache, getName, getNextM4SequenceValue, getNumberOfLoops, getOperator, getOpParamsIterator, getParameter, getParameter, getSingleParameter, getSingleParameter, getStep, handleAssertions, isDeselectedParameter, isLoopable, isManual, isStepable, print, putM4ObjectToCache, showCreateStatement, storedProceduresAvailable
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

AssignStochasticValue

public AssignStochasticValue()
Method Detail

generateValueForOp

public java.lang.String generateValueForOp(Column columnWithMissingValues)
                                    throws M4CompilerError
Description copied from class: MissingValues
The abstract method to be implemented by the subclasses.

Specified by:
generateValueForOp in class MissingValues
Parameters:
columnWithMissingValues - The Column which has some missing values.
Returns:
A String with an SQL definition which is used to replace the missing values of the given column. It must include quotes if necessary.
Throws:
M4CompilerError - A simple exception object with an error message.
See Also:
miningmart.compiler.operator.MissingValues#generateValueForOp


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