JQuantiles1D.cc

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#include <string>
#include <iostream>
#include <iomanip>

#include "TROOT.h"
#include "TFile.h"
#include "TObject.h"
#include "TKey.h"
#include "TH1D.h"
#include "TString.h"
#include "TRegexp.h"

#include "JGizmo/JRootObjectID.hh"
#include "JGizmo/JGizmoToolkit.hh"

#include "Jeep/JPrint.hh"
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"

  
/**
 * \file
 *
 * Auxiliary program to print quantiles from 1D histogram.
 * The option <tt>-f</tt> corresponds to <tt><file name>:<object name></tt>.
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;

  vector<JRootObjectID>   inputFile;
  vector<double>          Q;
  bool                    reverse;
  int                     debug;
 
  try {

    JParser<> zap("Auxiliary program to print quantiles from 1D histogram.");
    
    zap['f'] = make_field(inputFile);
    zap['Q'] = make_field(Q);
    zap['R'] = make_field(reverse);
    zap['d'] = make_field(debug)      = 0;
     
    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }


  if (Q.empty()) {
    FATAL("No quantiles." << endl);
  }


  for (vector<JRootObjectID>::const_iterator input = inputFile.begin(); input != inputFile.end(); ++input) {

    DEBUG("Input: " << *input << endl);

    TDirectory* dir = getDirectory(*input);

    if (dir == NULL) {
      ERROR("File: " << input->getFullFilename() << " not opened." << endl);
      continue;
    }

    const TRegexp regexp(input->getObjectName());

    TIter iter(dir->GetListOfKeys());

    for (TKey* key; (key = (TKey*) iter.Next()) != NULL; ) {

      const TString tag(key->GetName());

      DEBUG("Key: " << tag << " match = " << tag.Contains(regexp) << endl);
        
      // option match

      if (tag.Contains(regexp)) {

        TObject* object = key->ReadObj();

        try {

          TH1& h1 = dynamic_cast<TH1&>(*object);

          Double_t W = 0.0;

          for (Int_t i = 0; i <= h1.GetXaxis()->GetNbins() + 1; ++i) {
            W += h1.GetBinContent(i);
          }

          if (W != 0.0) {

            Double_t w = 0.0;
                
            if (!reverse) {

              for (int i = 0, k = 0; i <= h1.GetXaxis()->GetNbins() + 1; ++i) {
                  
                w += h1.GetBinContent(i);
                
                for ( ; k != (int) Q.size() && w >= Q[k]*W; ++k) {
                  cout << h1.GetName() << ' ' << FIXED(4,2) << Q[k] << ' ' << FIXED(10,5) << h1.GetXaxis()->GetBinCenter(i) << endl;
                }
                
              }
              
            } else {

              for (int i = h1.GetXaxis()->GetNbins() + 1, k = 0; i >= 0; --i) {
                
                w += h1.GetBinContent(i);
                
                for ( ; k != (int) Q.size() && w >= Q[k]*W; ++k) {
                  cout << h1.GetName() << ' ' << FIXED(4,2) << Q[k] << ' ' << FIXED(10,5) << h1.GetXaxis()->GetBinCenter(i) << endl;
                }
              }
            }
          }
        }           
        catch(exception&) {
          ERROR("Not available for other objects than 1D histograms." << endl);
        }
      }
    }
  }
}