Class AddNoise

Method Details

• globalInfo

  public String globalInfo()

  Returns a string describing this filter

  Returns:

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

• listOptions

  public 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(String[] options) throws Exception

  Parses a given list of options.

  Valid options are:

   -C <col>
    Index of the attribute to be changed 
    (default last attribute)

   -M
    Treat missing values as an extra value 
   

   -P <num>
    Specify the percentage of noise introduced 
    to the data (default 10)

   -S <num>
    Specify the random number seed (default 1)

  Specified by:

  setOptions in interface OptionHandler

  Parameters:

  options - the list of options as an array of strings

  Throws:

  Exception - if an option is not supported

• getOptions

  public 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

• useMissingTipText

  public String useMissingTipText()

  Returns the tip text for this property

  Returns:

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

• getUseMissing

  public boolean getUseMissing()

  Gets the flag if missing values are treated as extra values.

  Returns:

  the flag missing values.

• setUseMissing

  public void setUseMissing(boolean newUseMissing)

  Sets the flag if missing values are treated as extra values.

  Parameters:

  newUseMissing - the new flag value.

• randomSeedTipText

  public String randomSeedTipText()

  Returns the tip text for this property

  Returns:

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

• getRandomSeed

  public int getRandomSeed()

  Gets the random number seed.

  Returns:

  the random number seed.

• setRandomSeed

  public void setRandomSeed(int newSeed)

  Sets the random number seed.

  Parameters:

  newSeed - the new random number seed.

• percentTipText

  public String percentTipText()

  Returns the tip text for this property

  Returns:

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

• getPercent

  public int getPercent()

  Gets the size of noise data as a percentage of the original set.

  Returns:

  the noise data size

• setPercent

  public void setPercent(int newPercent)

  Sets the size of noise data, as a percentage of the original set.

  Parameters:

  newPercent - the subsample set size, between 0 and 100.

• attributeIndexTipText

  public String attributeIndexTipText()

  Returns the tip text for this property

  Returns:

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

• getAttributeIndex

  public String getAttributeIndex()

  Get the index of the attribute used.

  Returns:

  the index of the attribute

• setAttributeIndex

  public void setAttributeIndex(String attIndex)

  Sets index of the attribute used.

  Parameters:

  attIndex - the index of the attribute

• getCapabilities

  public Capabilities getCapabilities()

  Returns the Capabilities of this filter.

  Specified by:

  getCapabilities in interface CapabilitiesHandler

  Overrides:

  getCapabilities in class Filter

  Returns:

  the capabilities of this object

  See Also:

  • Capabilities

• setInputFormat

  public boolean setInputFormat(Instances instanceInfo) throws 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:

  Exception - if the input format can't be set successfully

• input

  public boolean input(Instance instance) throws Exception

  Input an instance for filtering.

  Overrides:

  input in class Filter

  Parameters:

  instance - the input instance

  Returns:

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

  Throws:

  Exception - if the input format was not set

• batchFinished

  public boolean batchFinished() throws 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.

  Overrides:

  batchFinished in class Filter

  Returns:

  true if there are instances pending output

  Throws:

  Exception - if no input structure has been defined

• addNoise

  public void addNoise(Instances instances, int seed, int percent, int attIndex, boolean useMissing)

  add noise to the dataset a given percentage of the instances are changed in the way, that a set of instances are randomly selected using seed. The attribute given by its index is changed from its current value to one of the other possibly ones, also randomly. This is done with leaving the apportion the same. if m_UseMissing is true, missing value is used as a value of its own

  Parameters:

  instances - is the dataset

  seed - used for random function

  percent - percentage of instances that are changed

  attIndex - index of the attribute changed

  useMissing - if true missing values are treated as extra value

• getRevision

  public String getRevision()

  Returns the revision string.

  Specified by:

  getRevision in interface RevisionHandler

  Overrides:

  getRevision in class Filter

  Returns:

  the revision

• main

  public static void main(String[] argv)

  Main method for testing this class.

  Parameters:

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