/**
  \file PairErr.h "utl/PairErr.h"
  declaration of class PairErr

  \author Stefano Argiro
  \version $Id$
  \date 26 Sep 2003
*/

#ifndef _utl_PairErr_h_
#define _utl_PairErr_h_


static const char CVSId_utl_PairErr[] =
  "$Id$";


namespace utl {

  /**
    \class PairErr

    \brief A pair of graph points (x,y) with errors

    \author Stefano Argiro
    \date 26 Sep 2003
    \ingroup stl
  */

  class PairErr {

  public:
    PairErr() : fX(0), fY(0), fXErr(0), fYErr(0) { }
    PairErr(const double x, const double xErr,
	    const double y, const double yErr) :
      fX(x), fY(y), fXErr(xErr), fYErr(yErr) { }

    double X() const { return fX; }
    double Y() const { return fY; }

    double XErr() const { return fXErr; }
    double YErr() const { return fYErr; }

  private:
    double fX;
    double fY;
    double fXErr;
    double fYErr;

  };

}


#endif

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