// $Id: Kernel.h 411 2005-11-30 16:20:40Z jari $

#ifndef _theplu_statistics_kernel_
#define _theplu_statistics_kernel_

namespace theplu {
namespace statistics { 
namespace regression{
	///
	/// Abstract Base Class for calculating the weights in a more
	/// general way than classical rectangular windows.
	///

	class Kernel
	{
		
		public:
		///
		/// Constructor
		///
		Kernel();

		///
		/// Function calculating the weight 
		///
		virtual double weight(const double) const=0;
	};

} // of namespace regression
} // of namespace statistics
} // of namespace theplu

#endif