/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_7/src/DQM/SiStripCommissioningAnalysis/src/ApvLatencyAlgorithm.cc

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#include "DQM/SiStripCommissioningAnalysis/interface/ApvLatencyAlgorithm.h"
#include "CondFormats/SiStripObjects/interface/ApvLatencyAnalysis.h" 
#include "DataFormats/SiStripCommon/interface/SiStripHistoTitle.h"
#include "DataFormats/SiStripCommon/interface/SiStripEnumsAndStrings.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "TProfile.h"
#include <iostream>
#include <cmath>

using namespace sistrip;

// ----------------------------------------------------------------------------
// 
ApvLatencyAlgorithm::ApvLatencyAlgorithm( const edm::ParameterSet & pset, ApvLatencyAnalysis* const anal ) 
  : CommissioningAlgorithm(anal),
    histo_(0,"")
{;}

// ----------------------------------------------------------------------------
// 
void ApvLatencyAlgorithm::extract( const std::vector<TH1*>& histos ) { 

  if ( !anal() ) {
    edm::LogWarning(mlCommissioning_)
      << "[ApvLatencyAlgorithm::" << __func__ << "]"
      << " NULL pointer to Analysis object!";
    return; 
  }
  
  // Check
  if ( histos.size() != 1 ) {
    anal()->addErrorCode(sistrip::numberOfHistos_);
  }
  
  // Extract FED key from histo title
  if ( !histos.empty() ) { anal()->fedKey( extractFedKey( histos.front() ) ); }
  
  // Extract histograms
  std::vector<TH1*>::const_iterator ihis = histos.begin();
  for ( ; ihis != histos.end(); ihis++ ) {
    
    // Check for NULL pointer
    if ( !(*ihis) ) { continue; }
    
    // Check name
    SiStripHistoTitle title( (*ihis)->GetName() );
    if ( title.runType() != sistrip::APV_LATENCY ) {
      anal()->addErrorCode(sistrip::unexpectedTask_);
      continue;
    }
    
    // Extract timing histo
    histo_.first = *ihis;
    histo_.second = (*ihis)->GetName();
    
  }
 
}

// ----------------------------------------------------------------------------
// 
void ApvLatencyAlgorithm::analyse() { 

  if ( !anal() ) {
    edm::LogWarning(mlCommissioning_)
      << "[ApvLatencyAlgorithm::" << __func__ << "]"
      << " NULL pointer to base Analysis object!";
    return; 
  }

  CommissioningAnalysis* tmp = const_cast<CommissioningAnalysis*>( anal() );
  ApvLatencyAnalysis* anal = dynamic_cast<ApvLatencyAnalysis*>( tmp );
  if ( !anal ) {
    edm::LogWarning(mlCommissioning_)
      << "[ApvLatencyAlgorithm::" << __func__ << "]"
      << " NULL pointer to derived Analysis object!";
    return; 
  }

  // was in deprecated()

  std::vector<const TProfile*> histos; 
  std::vector<unsigned short> monitorables;

  // was in analysis()
  
  histos.clear();
  histos.push_back( const_cast<const TProfile*>( dynamic_cast<TProfile*>(histo_.first) ) );
  if ( !histos[0] ) {
    anal->addErrorCode(sistrip::nullPtr_);
    return;
  }
  
  monitorables.clear();

  //LogDebug("Commissioning|Algorithm") << "[ApvLatencyAlgorithm::analysis]";
  
  //extract root histogram
  //check 
  if (histos.size() != 1) { 
    //     edm::LogWarning("Commissioning|Algorithm") << "[ApvLatencyAlgorithm::analysis]: Requires \"const std::vector<const TH1F*>& \" argument to have size 1. Actual size: " << histos.size() << ". Monitorables set to 0."; 
    monitorables.push_back(0);
    return; 
  }
  const TProfile* histo = histos[0];

  //monitorable
  unsigned short latency;

  std::vector<unsigned short> binContent; binContent.reserve((unsigned short)histo->GetNbinsX()); binContent.resize((unsigned short)histo->GetNbinsX(), 0);

  for (unsigned short k = 0; k < (unsigned short)histo->GetNbinsX(); k++) { // k is bin number

    //fill std::vector with histogram contents
    binContent.push_back((unsigned int)(histo->GetBinContent(k)));}

  //calculate median
  
  sort(binContent.begin(), binContent.end());
 
  //calculate mean and mean2 of the readout within cutoffs
 
  float meanNoise = 0.;//M.W method
  float mean2Noise = 0.;
 
  for (unsigned short k = (unsigned short)(binContent.size()*.1); k < (unsigned short)(binContent.size()*.9); k++) {
    meanNoise += binContent[k];
    mean2Noise += binContent[k]*binContent[k];;
  }
 
  meanNoise = meanNoise * binContent.size() * 0.8;
  mean2Noise = mean2Noise * binContent.size() * 0.8;
  float sigmaNoise = sqrt(fabs(meanNoise*meanNoise - mean2Noise));
 
  //loop to look for signal > 5* sigma_noise
  unsigned short count = 0;
  unsigned short maxlatency = 0;
  unsigned int maxhits = 0;
 
  for (unsigned short k = 1; k < ((unsigned short)histo->GetNbinsX() + 1); k++) { // k is bin number
    if (histo->GetBinContent((Int_t)k) > maxhits) maxlatency = k - 1;
    if ((float)histo->GetBinContent((Int_t)k) > (meanNoise + 5 * sigmaNoise)) { 
      latency = k - 1; count++;
    }
  }
 
  if (!count) {
    //   LogDebug("Commissioning|Algorithm") << "[ApvLatencyAlgorithm::analysis]: Warning: no signal found > mean + 5*sigma(noise). Returning latency of highest number of recorded hits.";
    latency = maxlatency;
  }
 
  if (count > 1) {
    //    LogDebug("Commissioning|Algorithm") << "[ApvLatencyAlgorithm::analysis]: Warning: more than one signal found > mean + 5*sigma(noise). Returning latency of highest number of recorded hits.";
    latency = maxlatency;
  }

  //set monitorables
  monitorables.clear();
  monitorables.push_back(latency);

  anal->latency_ = monitorables[0];
  
}