text: 
  #include "CalibCalorimetry/EcalPedestalOffsets/interface/TSinglePedEntry.h"
  #include <cmath>
  #include <iostream>
  
  TSinglePedEntry::TSinglePedEntry() : m_pedestalSqSum(0), m_pedestalSum(0), m_entries(0) {
    //  std::cout << "[TSinglePedEntry][ctor]" << std::endl ;
  }
  
  TSinglePedEntry::~TSinglePedEntry() {}
  
  TSinglePedEntry::TSinglePedEntry(const TSinglePedEntry &orig) {
    m_pedestalSqSum = orig.m_pedestalSqSum;
    m_pedestalSum = orig.m_pedestalSum;
    m_entries = orig.m_entries;
  }
  
  void TSinglePedEntry::insert(const int &pedestal) {
    m_pedestalSqSum += pedestal * pedestal;
    m_pedestalSum += pedestal;
    ++m_entries;
  }
  
  double TSinglePedEntry::average() const {
    if (!m_entries)
      return -1;
    return static_cast<double>(m_pedestalSum) / m_entries;
  }
  
  double TSinglePedEntry::RMS() const {
    if (!m_entries)
      return -1;
    return sqrt(RMSSq());
  }
  
  double TSinglePedEntry::RMSSq() const {
    /*
      std::cout << "[TSinglePedEntry][minchia] " << m_pedestalSum
                << "\t" << m_pedestalSum
                << "\t" << m_entries << std::endl ;   // FIXME
    */
    if (!m_entries)
      return -1;
    double num = 1. / static_cast<double>(m_entries);
    double output = m_pedestalSqSum * num - m_pedestalSum * num * m_pedestalSum * num;
    return output;
  }
  