Class NumbersFilter

java.lang.Object
  weka.filters.Filter
      NumbersFilter

All Implemented Interfaces:

java.io.Serializable

public class NumbersFilter
extends Filter

Removes all numbers from all the string attributes in the given dataset. Assumes that words are separated by whitespace.

Version:

1.0

Author:

Eibe Frank ([email protected])

See Also:

Serialized Form

Constructor Summary

NumbersFilter()

Method Summary

boolean	batchFinished() Signify that this batch of input to the filter is finished.
java.lang.String	globalInfo() Returns a string describing this filter
boolean	input(Instance instance) Input an instance for filtering.
static void	main(java.lang.String[] argv) Main method for testing this class.
boolean	setInputFormat(Instances instanceInfo) Sets the format of the input instances.

Methods inherited from class weka.filters.Filter

batchFilterFile, filterFile, getOutputFormat, inputFormat, isOutputFormatDefined, numPendingOutput, output, outputFormat, outputPeek, useFilter

Methods inherited from class java.lang.Object

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

Constructor Detail

NumbersFilter

public NumbersFilter()

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns a string describing this filter

Returns:

a description of the filter suitable for displaying in the explorer/experimenter gui

batchFinished

public boolean batchFinished()
                      throws java.lang.Exception

Signify that this batch of input to the filter is finished. If the filter requires all instances prior to filtering, output() may now be called to retrieve the filtered instances. Any subsequent instances filtered should be filtered based on setting obtained from the first batch (unless the inputFormat has been re-assigned or new options have been set). This default implementation assumes all instance processing occurs during inputFormat() and input().

Overrides:

batchFinished in class Filter

Returns:

true if there are instances pending output

Throws:

java.lang.NullPointerException - if no input structure has been defined,

java.lang.Exception - if there was a problem finishing the batch.

setInputFormat

public boolean setInputFormat(Instances instanceInfo)
                       throws java.lang.Exception

Sets the format of the input instances.

Overrides:

setInputFormat in class Filter

Parameters:

instanceInfo - an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).

Returns:

true if the outputFormat may be collected immediately

Throws:

java.lang.Exception - if the inputFormat can't be set successfully

input

public boolean input(Instance instance)
              throws java.lang.Exception

Input an instance for filtering. Ordinarily the instance is processed and made available for output immediately. Some filters require all instances be read before producing output.

Overrides:

input in class Filter

Parameters:

instance - the input instance

Returns:

true if the filtered instance may now be collected with output().

Throws:

java.lang.Exception - if the input instance was not of the correct format or if there was a problem with the filtering.

main

public static void main(java.lang.String[] argv)

Main method for testing this class.

Parameters:

argv - should contain arguments to the filter: use -h for help