weka.filters.unsupervised.instance
Class Normalize

java.lang.Object
  extended by weka.filters.Filter
      extended by weka.filters.unsupervised.instance.Normalize
All Implemented Interfaces:
java.io.Serializable, OptionHandler, UnsupervisedFilter

public class Normalize
extends Filter
implements UnsupervisedFilter, OptionHandler

This filter normalize all instances of a dataset to have a given norm. Only numeric values are considered, and the class attribute is ignored. Valid filter-specific options are:

-L num
Specify the Lnorm to used on the normalization (default 2.0).

-N num
Specify the norm of the instances after normalization (default 1.0).

Version:
$Revision: 1.2.2.1 $
Author:
Julien Prados
See Also:
Serialized Form

Constructor Summary
Normalize()
           
 
Method Summary
 double getLNorm()
          Get the L Norm used.
 double getNorm()
          Get the instance's Norm.
 java.lang.String[] getOptions()
          Gets the current settings of the filter.
 java.lang.String globalInfo()
          Returns a string describing this filter
 boolean input(Instance instance)
          Input an instance for filtering.
 java.util.Enumeration listOptions()
          Returns an enumeration describing the available options.
 java.lang.String LNormTipText()
          Returns the tip text for this property
static void main(java.lang.String[] argv)
          Main method for testing this class.
 java.lang.String normTipText()
          Returns the tip text for this property
 boolean setInputFormat(Instances instanceInfo)
          Sets the format of the input instances.
 void setLNorm(double newLNorm)
          Set the L-norm to used
 void setNorm(double newNorm)
          Set the norm of the instances
 void setOptions(java.lang.String[] options)
          Parses a list of options for this object.
 
Methods inherited from class weka.filters.Filter
batchFilterFile, batchFinished, 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

Normalize

public Normalize()
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

LNormTipText

public java.lang.String LNormTipText()
Returns the tip text for this property

Returns:
tip text for this property suitable for displaying in the explorer/experimenter gui

normTipText

public java.lang.String normTipText()
Returns the tip text for this property

Returns:
tip text for this property suitable for displaying in the explorer/experimenter gui

listOptions

public java.util.Enumeration listOptions()
Returns an enumeration describing the available options.

Specified by:
listOptions in interface OptionHandler
Returns:
an enumeration of all the available options.

setOptions

public void setOptions(java.lang.String[] options)
                throws java.lang.Exception
Parses a list of options for this object. Valid options are:

-L num
Specify the L-Norm to use (default 2.0).

-N num
Specify the norm of the instances after normalization (default 1.0).

Specified by:
setOptions in interface OptionHandler
Parameters:
options - the list of options as an array of strings
Throws:
java.lang.Exception - if an option is not supported

getOptions

public java.lang.String[] getOptions()
Gets the current settings of the filter.

Specified by:
getOptions in interface OptionHandler
Returns:
an array of strings suitable for passing to setOptions

getNorm

public double getNorm()
Get the instance's Norm.

Returns:
the Norm

setNorm

public void setNorm(double newNorm)
Set the norm of the instances

Parameters:
newNorm - the norm to wich the instances must be set

getLNorm

public double getLNorm()
Get the L Norm used.

Returns:
the L-norm used

setLNorm

public void setLNorm(double newLNorm)
Set the L-norm to used

Parameters:
the - L-norm

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.IllegalStateException - if no input format has been defined.
java.lang.NullPointerException - if the input format has not been defined.
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