#ifndef __JROOT__JGRAPHERRORS__
#define __JROOT__JGRAPHERRORS__

#include <vector>

#include "TGraphErrors.h"

/**
 * \author mdejong
 */

namespace JROOT {}
namespace JPP { using namespace JROOT; }

namespace JROOT {


  /**
   * Data structure for graph data.
   */
  struct JGraphErrors_t {
    /**
     * Put data.
     *
     * \param  x              abscissa value
     * \param  y              ordinate value
     * \param  ex             abscissa error
     * \param  ey             ordinate error
     */
    void put(const Double_t x,  const Double_t y,
	     const Double_t ex, const Double_t ey)
    {
      X .push_back(x);
      Y .push_back(y);
      DX.push_back(ex);
      DY.push_back(ey);
    }

    std::vector<Double_t> X;   //!< abscissa values
    std::vector<Double_t> Y;   //!< ordinate values
    std::vector<Double_t> DX;  //!< abscissa errors
    std::vector<Double_t> DY;  //!< ordinate errors
  };


  /**
   * Auxiliary data structure to build TGraphErrors.
   */
  struct JGraphErrors : 
    public TGraphErrors
  {
    /**
     * Constructor.
     *
     * \param  graph          graph data
     * \param  name           graph name
     */
    JGraphErrors(const JGraphErrors_t& graph, const char* name) :
      TGraphErrors(graph.X .size(),
		   graph.X .data(),
		   graph.Y .data(),
		   graph.DX.data(),
		   graph.DY.data())
    {
      SetName(name);
    }
  };
}

#endif