source: trunk/src/KernelFunction.h @ 99

// $Id: KernelFunction.h 99 2004-06-10 15:29:46Z peter $

#ifndef _theplu_cpptools_kernel_function_
#define _theplu_cpptools_kernel_function_

namespace theplu {

namespace gslapi {
  class vector;
}

namespace cpptools {

  ///
  ///   Virtual Class calculating one element in the kernel matrix
  ///   (i.e. the scalar product in feature space) from the two
  ///   corresponding vector in the data matrix.
  ///
  class KernelFunction 
  {
    
  public:
    ///
    /// Constructor
    ///    
    KernelFunction(void) {};

    ///
    /// Destructor
    ///
    virtual ~KernelFunction(void) {};
    
    virtual double operator()(const gslapi::vector&,
                              const gslapi::vector&) const = 0; 
    
    virtual double operator()(const gslapi::vector&,
                              const gslapi::vector&,
                              const gslapi::vector&,
                              const gslapi::vector&) const = 0; 
    
  }; // class KernelFunction

}} // of namespace cpptools and namespace theplu

#endif