com.rapidminer.operator.preprocessing.filter.attributes
Class NoMissingValuesAttributeFilter

java.lang.Object
  com.rapidminer.operator.preprocessing.filter.attributes.AbstractAttributeFilterCondition
      com.rapidminer.operator.preprocessing.filter.attributes.NoMissingValuesAttributeFilter

All Implemented Interfaces:

AttributeFilterCondition

public class NoMissingValuesAttributeFilter
extends AbstractAttributeFilterCondition

This class implements a no missing value filter for attributes. Attributes are filtered and hence be removed from exampleSet if there are missing values in one of the examples in this attribute.

Author:

Sebastian Land, Ingo Mierswa

Nested Class Summary

Nested classes/interfaces inherited from interface com.rapidminer.operator.preprocessing.filter.attributes.AttributeFilterCondition

AttributeFilterCondition.ScanResult

Constructor Summary

NoMissingValuesAttributeFilter()

Method Summary

AttributeFilterCondition.ScanResult	beforeScanCheck(Attribute attribute) This method initializes this condition and resets all counters.
AttributeFilterCondition.ScanResult	check(Attribute attribute, Example example) This method checks the given example.
boolean	isNeedingScan() Indicates if this filter needs a data scan, i.e. an invocation of the check method for each example.

Methods inherited from class com.rapidminer.operator.preprocessing.filter.attributes.AbstractAttributeFilterCondition

checkAfterFullScan, getParameterTypes, init, isNeedingFullScan

Methods inherited from class java.lang.Object

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

Constructor Detail

NoMissingValuesAttributeFilter

public NoMissingValuesAttributeFilter()

Method Detail

check

public AttributeFilterCondition.ScanResult check(Attribute attribute,
                                                 Example example)

Description copied from interface: AttributeFilterCondition

This method checks the given example. During this method the filter might check data to decide if attribute should be filtered out. If the condition needs a full scan before it can decide, this result is ignored.

Specified by:

check in interface AttributeFilterCondition

Overrides:

check in class AbstractAttributeFilterCondition

beforeScanCheck

public AttributeFilterCondition.ScanResult beforeScanCheck(Attribute attribute)

Description copied from interface: AttributeFilterCondition

This method initializes this condition and resets all counters. It returns REMOVE, if the attribute can be removed without checking examples. If it has been removed, no checking during examples will occur. If it returns UNCHECKED, this Attribute Filter needs a full check and hence the attribute cannot be deleted or kept. Distinguishing this is important, because of the inverting, which otherwise might remove attributes although they only have been kept for later checking.

Parameters:

attribute - this is the attribute, the filter will have to check for.

isNeedingScan

public boolean isNeedingScan()

Description copied from interface: AttributeFilterCondition

Indicates if this filter needs a data scan, i.e. an invocation of the check method for each example.

Specified by:

isNeedingScan in interface AttributeFilterCondition

Overrides:

isNeedingScan in class AbstractAttributeFilterCondition