// @(#)root/mathmore:$Id: InterpolationTypes.h 24403 2008-06-20 08:31:10Z moneta $
// Authors: L. Moneta, A. Zsenei   08/2005 

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  * Copyright (c) 2004 ROOT Foundation,  CERN/PH-SFT                   *
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// Header file for class InterpolationTypes
// 
// Created by: moneta  at Fri Nov 26 15:40:58 2004
// 
// Last update: Fri Nov 26 15:40:58 2004
// 
#ifndef ROOT_Math_InterpolationTypes
#define ROOT_Math_InterpolationTypes


namespace ROOT {
namespace Math {


  namespace Interpolation { 

    /**
       Enumeration defining the types of interpolation methods availables. 
       Passed as argument to instantiate mathlib::Interpolator objects. 
       The types available are (more information is available in the 
       <A HREF="http://www.gnu.org/software/gsl/manual/html_node/Interpolation-Types.html">GSL manual</A>):
       <ul>
       <li>LINEAR interpolation;
       <li>POLYNOMIAL interpolation, to be used for small number of points since introduces large oscillations;
       <li>CSPLINE cubic spline with natural boundary conditions;
       <li>CSPLINE_PERIODIC cubic spline with periodic boundary conditions;
       <li>AKIMA, Akima spline with natural boundary conditions ( requires a minimum of 5 points);
       <li>AKIMA_PERIODIC, Akima spline with periodic boundaries ( requires a minimum of 5 points); 
       </ul>


       @ingroup Interpolation
     */

    // enumerations for the type of interpolations
    enum Type {  kLINEAR, 
		 kPOLYNOMIAL, 
 		 kCSPLINE, 
 		 kCSPLINE_PERIODIC,  
		 kAKIMA, 
		 kAKIMA_PERIODIC
    };
  }


} // namespace Math
} // namespace ROOT

#endif /* ROOT_Math_InterpolationTypes */