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// ** Copyright UCAR (c) 1990 - 2016                                         
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// ** National Center for Atmospheric Research (NCAR)                        
// ** Boulder, Colorado, USA                                                 
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/**
 *
 * @file MeanStatCalc.cc
 *
 * @class MeanStatCalc
 *
 * Class for calculating the mean value statistic.
 *  
 * @date 8/31/2011
 *
 */

#include <iostream>

#include "MeanStatCalc.hh"

using namespace std;

/**********************************************************************
 * Constructor
 */

MeanStatCalc::MeanStatCalc()
{
}


/**********************************************************************
 * Destructor
 */

MeanStatCalc::~MeanStatCalc()
{
}
  

/**********************************************************************
 * calculate()
 */

double MeanStatCalc::calculate(const vector< double > &values) const
{
  // If there are no values in the list, return the bad data value

  if (values.size() == 0)
    return BAD_DATA_VALUE;
  
  // Calculate the mean of the values

  double sum = 0.0;
  int num_values = 0;
  
  for (vector< double >::const_iterator value = values.begin();
       value != values.end(); ++value)
  {
    sum += *value;
    num_values++;
  } /* endfor - value */
  
  return sum / (double)num_values;
}


/**********************************************************************
 *              Private Member Functions                              *
 **********************************************************************/