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## weka.classifiers.functions.supportVector
Class Puk

    java.lang.Object
      weka.classifiers.functions.supportVector.Kernel
          weka.classifiers.functions.supportVector.CachedKernel
              weka.classifiers.functions.supportVector.Puk

All Implemented Interfaces:
  java.io.Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler, TechnicalInformationHandler

    public class Puk

extends CachedKernel
implements TechnicalInformationHandler

The Pearson VII function-based universal kernel.
For more information see:
B. Uestuen, W.J. Melssen, L.M.C. Buydens (2006). Facilitating the application of Support Vector Regression by using a universal Pearson VII function based kernel. Chemometrics and Intelligent Laboratory Systems. 81:29-40.

Valid options are:

     -D
      Enables debugging output (if available) to be printed.
      (default: off)

     -no-checks
      Turns off all checks - use with caution!
      (default: checks on)

     -C <num>
      The size of the cache (a prime number), 0 for full cache and
      -1 to turn it off.
      (default: 250007)

     -O <num>
      The Omega parameter.
      (default: 1.0)

     -S <num>
      The Sigma parameter.
      (default: 1.0)

Version:
  $Revision: 5518 $
Author:
  Bernhard Pfahringer (bernhard@cs.waikato.ac.nz)
See Also:
  Serialized Form

Constructor Summary
`Puk()` default constructor - does nothing.
`Puk(Instances data, int cacheSize, double omega, double sigma)` Constructor.

Method Summary
`void` | `buildKernel(Instances data)` builds the kernel with the given data.
`Capabilities` | `getCapabilities()` Returns the Capabilities of this kernel.
`double` | `getOmega()` Gets the omega value.
`java.lang.String[]` | `getOptions()` Gets the current settings of the Kernel.
`java.lang.String` | `getRevision()` Returns the revision string.
`double` | `getSigma()` Gets the sigma value.
`TechnicalInformation` | `getTechnicalInformation()` Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.
`java.lang.String` | `globalInfo()` Returns a string describing the kernel
`java.util.Enumeration` | `listOptions()` Returns an enumeration describing the available options.
`java.lang.String` | `omegaTipText()` Returns the tip text for this property
`void` | `setOmega(double value)` Sets the omega value.
`void` | `setOptions(java.lang.String[] options)` Parses a given list of options.
`void` | `setSigma(double value)` Sets the sigma value.
`java.lang.String` | `sigmaTipText()` Returns the tip text for this property
`java.lang.String` | `toString()` returns a string representation for the Kernel

Methods inherited from class weka.classifiers.functions.supportVector.CachedKernel
`cacheSizeTipText, clean, eval, getCacheSize, numCacheHits, numEvals, setCacheSize`

Methods inherited from class weka.classifiers.functions.supportVector.Kernel
`checksTurnedOffTipText, debugTipText, forName, getChecksTurnedOff, getDebug, makeCopies, makeCopy, setChecksTurnedOff, setDebug`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### Puk

    public Puk()

  default constructor - does nothing.

### Puk

    public Puk(Instances data,
               int cacheSize,
               double omega,
               double sigma)
        throws java.lang.Exception

  Constructor. Initializes m_kernelPrecalc[].

  Parameters:
    `data` - the data to use
    `cacheSize` - the size of the cache
    `omega` - the exponent
    `sigma` - the bandwidth
  Throws:
    `java.lang.Exception` - if something goes wrong

Method Detail

### globalInfo

    public java.lang.String globalInfo()

  Returns a string describing the kernel

  Specified by:
    `globalInfo` in class `Kernel`
  Returns:
    a description suitable for displaying in the explorer/experimenter gui

### getTechnicalInformation

    public TechnicalInformation getTechnicalInformation()

  Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.

  Specified by:
    `getTechnicalInformation` in interface `TechnicalInformationHandler`
  Returns:
    the technical information about this class

### listOptions

    public java.util.Enumeration listOptions()

  Returns an enumeration describing the available options.

  Specified by:
    `listOptions` in interface `OptionHandler`
  Overrides:
    `listOptions` in class `CachedKernel`
  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:

       -D
        Enables debugging output (if available) to be printed.
        (default: off)

       -no-checks
        Turns off all checks - use with caution!
        (default: checks on)

       -C <num>
        The size of the cache (a prime number), 0 for full cache and
        -1 to turn it off.
        (default: 250007)

       -O <num>
        The Omega parameter.
        (default: 1.0)

       -S <num>
        The Sigma parameter.
        (default: 1.0)

  Specified by:
    `setOptions` in interface `OptionHandler`
  Overrides:
    `setOptions` in class `CachedKernel`
  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 Kernel.

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

### setOmega

    public void setOmega(double value)

  Sets the omega value.

  Parameters:
    `value` - the omega value

### getOmega

    public double getOmega()

  Gets the omega value.

  Returns:
    the omega value

### omegaTipText

    public java.lang.String omegaTipText()

  Returns the tip text for this property

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

### setSigma

    public void setSigma(double value)

  Sets the sigma value.

  Parameters:
    `value` - the sigma value

### getSigma

    public double getSigma()

  Gets the sigma value.

  Returns:
    the sigma value

### sigmaTipText

    public java.lang.String sigmaTipText()

  Returns the tip text for this property

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

### getCapabilities

    public Capabilities getCapabilities()

  Returns the Capabilities of this kernel.

  Specified by:
    `getCapabilities` in interface `CapabilitiesHandler`
  Overrides:
    `getCapabilities` in class `Kernel`
  Returns:
    the capabilities of this object
  See Also:
    `Capabilities`

### buildKernel

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

  builds the kernel with the given data. Initializes the kernel cache. The actual size of the cache in bytes is (64 * cacheSize).

  Overrides:
    `buildKernel` in class `CachedKernel`
  Parameters:
    `data` - the data to base the kernel on
  Throws:
    `java.lang.Exception` - if something goes wrong

### toString

    public java.lang.String toString()

  returns a string representation for the Kernel

  Overrides:
    `toString` in class `java.lang.Object`
  Returns:
    a string representaiton of the kernel

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Overrides:
    `getRevision` in class `Kernel`
  Returns:
    the revision

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