source: trunk/lib/statistics/KernelTriCube.h @ 382

// $Id: KernelTriCube.h 382 2005-08-12 15:01:26Z peter $


#ifndef _theplu_statistics_kernel_tricube_
#define _theplu_statistics_kernel_tricube_

#include <c++_tools/statistics/Kernel.h>


namespace theplu {
namespace statistics { 

  ///
  /// Class for TriCubal kernel.
  ///
  /// @todo move to theplu::statistics::regression namespace
  ///
  class KernelTriCube : public Kernel
  {
    
  public:
    ///
    /// Constructor
    ///
    KernelTriCube() ;

    ///
    /// Function calculating the weight as \f$ w(x)=(1-|x|^3)^3\f$ if
    /// \f$|x|\le 1 \f$, \f$ w(x)=0 \f$ otherwise.
    ///
    double weight(const double) const;
  
  private:
  };

}}  // of namespace statistics and namespace theplu

#endif