source: branches/better_matrix_class/lib/statistics/AveragerPair.cc @ 402

// $Id: AveragerPair.cc 295 2005-04-29 09:15:58Z peter $

#include <c++_tools/statistics/AveragerPair.h>
#include <c++_tools/statistics/Averager.h>

#include <utility>

namespace theplu {
namespace statistics{
  

  AveragerPair::AveragerPair(void)
    : x_(Averager()), y_(Averager()), xy_(0.0)
  {
  }

  AveragerPair::AveragerPair(const double x, const double xx, const double y, 
                     const double yy, const double xy, const long n)
    : x_(Averager(x,xx,n)), y_(Averager(y,yy,n)), xy_(xy)
  {
  }

  AveragerPair::AveragerPair(const AveragerPair& a)
    : x_(a.x_averager()), y_(a.y_averager()), xy_(a.sum_xy())
  {
  }

  const AveragerPair& AveragerPair::operator+=(const AveragerPair& a)
  {
    x_+=a.x_averager();
    y_+=a.y_averager();
    xy_+=a.sum_xy();
    return *this;
  }

}} // of namespace statistics and namespace theplu