weka.classifiers.functions.supportVector

## Class RegOptimizer

- java.lang.Object
- - weka.classifiers.functions.supportVector.RegOptimizer

- All Implemented Interfaces:
    java.io.Serializable, OptionHandler, RevisionHandler
  Direct Known Subclasses:
    RegSMO

      public class RegOptimizer
      extends java.lang.Object
      implements OptionHandler, java.io.Serializable, RevisionHandler

  Base class implementation for learning algorithm of SMOreg Valid options are:

       -L <double>
        The epsilon parameter in epsilon-insensitive loss function.
        (default 1.0e-3)

       -W <double>
        The random number seed.
        (default 1)

  Version:
    $Revision: 11613 $
  Author:
    Remco Bouckaert (remco@cs.waikato.ac.nz,rrb@xm.co.nz)
  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `double[]` | `m_alpha` alpha and alpha* arrays containing weights for solving dual problem
    `double[]` | `m_alphaStar`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `RegOptimizer()` the default constructor

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `buildClassifier(Instances data)` learn SVM parameters from data.
    `java.lang.String` | `epsilonParameterTipText()` Returns the tip text for this property
    `int` | `getCacheHits()` return the number of kernel cache hits
    `double` | `getEpsilonParameter()` Get the value of epsilon parameter of the epsilon insensitive loss function.
    `long` | `getKernelEvaluations()` returns the number of kernel evaluations
    `java.lang.String[]` | `getOptions()` Gets the current settings of the classifier.
    `java.lang.String` | `getRevision()` Returns the revision string.
    `int` | `getSeed()` Gets the current seed value for the random number generator
    `java.util.Enumeration<Option>` | `listOptions()` Gets an enumeration describing the available options.
    `boolean` | `modelBuilt()` flag to indicate whether the model was built yet
    `java.lang.String` | `seedTipText()` Returns the tip text for this property
    `void` | `setEpsilonParameter(double v)` Set the value of epsilon parameter of the epsilon insensitive loss function.
    `void` | `setOptions(java.lang.String[] options)` Parses a given list of options.
    `void` | `setSeed(int value)` Sets the seed value for the random number generator
    `void` | `setSMOReg(SMOreg value)` sets the parent SVM
    `double` | `SVMOutput(Instance inst)`
    `java.lang.String` | `toString()` Prints out the classifier.

    - ### Methods inherited from class java.lang.Object

      `equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### m_alpha

          public double[] m_alpha

      alpha and alpha* arrays containing weights for solving dual problem

    - #### m_alphaStar

          public double[] m_alphaStar

  - ### Constructor Detail

    - #### RegOptimizer

          public RegOptimizer()

      the default constructor

  - ### Method Detail

    - #### listOptions

          public java.util.Enumeration<Option> listOptions()

      Gets 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 given list of options.

      Valid options are:

           -L <double>
            The epsilon parameter in epsilon-insensitive loss function.
            (default 1.0e-3)

           -W <double>
            The random number seed.
            (default 1)

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

    - #### modelBuilt

          public boolean modelBuilt()

      flag to indicate whether the model was built yet
      Returns:
        true if the model was built

    - #### setSMOReg

          public void setSMOReg(SMOreg value)

      sets the parent SVM
      Parameters:
        `value` - the parent SVM

    - #### getKernelEvaluations

          public long getKernelEvaluations()

      returns the number of kernel evaluations
      Returns:
        the number of kernel evaluations

    - #### getCacheHits

          public int getCacheHits()

      return the number of kernel cache hits
      Returns:
        the number of hits

    - #### buildClassifier

          public void buildClassifier(Instances data)
                               throws java.lang.Exception

      learn SVM parameters from data. Subclasses should implement something more interesting.
      Parameters:
        `data` - the data to work with
      Throws:
        `java.lang.Exception` - always an Exceoption since subclasses must override it

    - #### SVMOutput

          public double SVMOutput(Instance inst)
                           throws java.lang.Exception

      Parameters:
        `inst` -
      Returns:
      Throws:
        `java.lang.Exception`

    - #### seedTipText

          public java.lang.String seedTipText()

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

    - #### getSeed

          public int getSeed()

      Gets the current seed value for the random number generator
      Returns:
        the seed value

    - #### setSeed

          public void setSeed(int value)

      Sets the seed value for the random number generator
      Parameters:
        `value` - the seed value

    - #### epsilonParameterTipText

          public java.lang.String epsilonParameterTipText()

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

    - #### getEpsilonParameter

          public double getEpsilonParameter()

      Get the value of epsilon parameter of the epsilon insensitive loss function.
      Returns:
        Value of epsilon parameter.

    - #### setEpsilonParameter

          public void setEpsilonParameter(double v)

      Set the value of epsilon parameter of the epsilon insensitive loss function.
      Parameters:
        `v` - Value to assign to epsilon parameter.

    - #### toString

          public java.lang.String toString()

      Prints out the classifier.
      Overrides:
        `toString` in class `java.lang.Object`
      Returns:
        a description of the classifier as a string

    - #### getRevision

          public java.lang.String getRevision()

      Returns the revision string.
      Specified by:
        `getRevision` in interface `RevisionHandler`
      Returns:
        the revision