org.knime.base.node.mine.decisiontree2.learner
Class InMemoryTableCreator

java.lang.Object
  org.knime.base.node.mine.decisiontree2.learner.InMemoryTableCreator

public class InMemoryTableCreator
extends Object

Creates an in memory representation of the given BufferedDataTable. The table only includes valid attributes (nominal, numeric and the class attribute).

Author:

Christoph Sieb, University of Konstanz

Constructor Summary

InMemoryTableCreator(BufferedDataTable table, int classColumnIndex, double minNumberRowsPerNode)
Creates a creator from the given table and the specified class index.

InMemoryTableCreator(BufferedDataTable table, int classColumnIndex, double minNumberRowsPerNode, boolean skipColumns)
Creates a creator from the given table and the specified class index.

Method Summary

InMemoryTable	createInMemoryTable(ExecutionContext exec) Creates the InMemoryTable.
int	getRemovedRowsDueToMissingClassValue() Returns the number of rows removed during table creation due to missing class values.

Methods inherited from class java.lang.Object

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

Constructor Detail

InMemoryTableCreator

public InMemoryTableCreator(BufferedDataTable table,
                            int classColumnIndex,
                            double minNumberRowsPerNode)

Creates a creator from the given table and the specified class index.

Parameters:

table - the data table from which to create the attribute lists

classColumnIndex - the class column index

minNumberRowsPerNode - the minimum number of nodes per leaf; used to determine whether this tables distribution of class values is pure enough

InMemoryTableCreator

public InMemoryTableCreator(BufferedDataTable table,
                            int classColumnIndex,
                            double minNumberRowsPerNode,
                            boolean skipColumns)

Creates a creator from the given table and the specified class index.

Parameters:

table - the data table from which to create the attribute lists

classColumnIndex - the class column index

minNumberRowsPerNode - the minimum number of nodes per leaf; used to determine whether this tables distribution of class values is pure enough

skipColumns - true to skip nominal columns that have no domain values information

Method Detail

createInMemoryTable

public InMemoryTable createInMemoryTable(ExecutionContext exec)
                                  throws CanceledExecutionException

Creates the InMemoryTable.

Parameters:

exec - the ExecutionContext to report the progress to

Returns:

the InMemoryTable

Throws:

CanceledExecutionException - thrown if the creation process is canceled by the user

getRemovedRowsDueToMissingClassValue

public int getRemovedRowsDueToMissingClassValue()

Returns the number of rows removed during table creation due to missing class values.

Returns:

the number of rows removed during table creation due to missing class values