edu.udo.cs.miningmart.operator
Class RowSelectionByUnbiasing
java.lang.Object
edu.udo.cs.miningmart.operator.ExecutableOperator
edu.udo.cs.miningmart.operator.ConceptOperator
edu.udo.cs.miningmart.operator.SingleCSOperator
edu.udo.cs.miningmart.operator.RowSelection
edu.udo.cs.miningmart.operator.RowSelectionByUnbiasing
- public class RowSelectionByUnbiasing
- extends RowSelection
- Version:
- $Id: RowSelectionByUnbiasing.java,v 1.4 2006/04/11 14:10:11 euler Exp $
- Author:
- Martin Scholz
Methods inherited from class edu.udo.cs.miningmart.operator.ConceptOperator |
compileStatement, createMetadata, createMetadataForOneBA, createSingleColumnSet, createStatement, estimateStatistics, generateColumns, getInputConcept, getNewCSName, getOutputConcept, getStringForSelection, setNewCSMultiStepBranch |
Methods inherited from class edu.udo.cs.miningmart.operator.ExecutableOperator |
autoPrint, checkConditions, doPrint, doPrint, execute, 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, load, print, putM4ObjectToCache, showCreateStatement, storedProceduresAvailable |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
RowSelectionByUnbiasing
public RowSelectionByUnbiasing()
generateSQLDefinition
public java.lang.String generateSQLDefinition(java.lang.String selectPart)
throws M4CompilerError
- Overrides the method from RowSelection
- Overrides:
generateSQLDefinition
in class RowSelection
- Throws:
M4CompilerError
- See Also:
edu.udo.cs.miningmart.m4.core.operator.SingleCSOperator#generateSQLDefinition(String)
,
edu.udo.cs.miningmart.m4.core.operator.RowSelection#generateSQLDefinition(String)
initByMasterBlock
protected void initByMasterBlock()
throws M4CompilerError,
java.sql.SQLException
- This method reads a block of the target size from the input Columnset
and initializes counters. The priors of the class labels are estimated
from their frequency in this "master block". The number of
occurences of instances in different "prediction subsets" is
kept, just the associated classes are randomly assigned according to the
estimated priors.
- Throws:
M4CompilerError
java.sql.SQLException
selectRowsForResult
protected void selectRowsForResult()
throws M4CompilerError
- This method tries to find a set of tuples satisfying the specifications
created by the
initByMasterBlock
method. A table is created
for the selected row numbers and it is filled with the result of this
sampling step. The number of tuples maximally read can be limited if the
according parameter is set to a positive value. Otherwise the size of the
input Columnset is chosen as the default value. Sampling is done with
replacement.
- Throws:
M4CompilerError
generateConditionForOp
public java.lang.String generateConditionForOp()
- Description copied from class:
RowSelection
- Abstract method to be implemented by all subclasses. Must return the
String for the WHERE part of the SQL definition of the output columnset.
- Specified by:
generateConditionForOp
in class RowSelection
- Returns:
- the WHERE condition
getPredictedLabelBA
public BaseAttribute getPredictedLabelBA()
throws M4CompilerError
- Returns:
- the attribute with the predicted label in case of models,
or an attribute defining a segment
- Throws:
M4CompilerError
getLabelBA
public BaseAttribute getLabelBA()
throws M4CompilerError
- Returns:
- the attribute with a nominal label (or property of interest)
- Throws:
M4CompilerError
getHowMany
public int getHowMany()
throws M4CompilerError
- Returns:
- the number of tuples to be selected
- Throws:
M4CompilerError
getMaxTuplesToRead
public int getMaxTuplesToRead()
throws M4CompilerError
- Returns:
- the number of tuples to be read at most, '0' means
not to limit the search
- Throws:
M4CompilerError
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