source: trunk/lib/svm/Kernel_mev.h @ 306

// $Id: Kernel_mev.h 306 2005-05-03 06:59:02Z peter $

#ifndef _theplu_svm_kernel_
#define _theplu_svm_kernel_

#include <c++_tools/gslapi/matrix.h>

namespace theplu {
namespace svm {

  class KernelFunction;

  ///
  ///   Class calculating the \f$NxN\f$ kernel matrix from the \f$MxN\f$
  ///   data matrix using KernelFunction. Each column in the data matrix
  ///   corresponds to one sample.
  ///   
  ///
  class Kernel 
  {
    
  public:
    
    ///
    ///   Constructor taking the data matrix and KernelFunction as
    ///   input. @note Can not handle NaNs. When dealing with missing values,
    ///   use constructor taking a weight matrix.
    Kernel(const gslapi::matrix&, const KernelFunction&);
    
    ///
    ///   Constructor taking the data matrix, the KernelFunction and a weight
    ///   matrix as input.
    Kernel(const gslapi::matrix&, const KernelFunction&, const gslapi::matrix&);

    ///
    ///   Destructor
    virtual ~Kernel(void);

    ///   @return Kernel matrix
    ///
    const gslapi::matrix& get() const {return k_;}
    
  private:
    gslapi::matrix k_;
    const KernelFunction* kf_;
    bool weighted_;

  }; // class Kernel

}} // of namespace svm and namespace theplu

#endif