TwoPointCorrelation1D_angular.cpp

Go to the documentation of this file.

/********************************************************************
 *  Copyright (C) 2015 by Federico Marulli and Alfonso Veropalumbo  *
 *  federico.marulli3@unibo.it                                      *
 *                                                                  *
 *  This program is free software; you can redistribute it and/or   * 
 *  modify it under the terms of the GNU General Public License as  *
 *  published by the Free Software Foundation; either version 2 of  *
 *  the License, or (at your option) any later version.             *
 *                                                                  *
 *  This program is distributed in the hope that it will be useful, *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of  *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   *
 *  GNU General Public License for more details.                    *
 *                                                                  *
 *  You should have received a copy of the GNU General Public       *
 *  License along with this program; if not, write to the Free      *
 *  Software Foundation, Inc.,                                      *
 *  59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.       *
 ********************************************************************/
 
#include "TwoPointCorrelation1D_angular.h"
 
using namespace std;
 
using namespace cbl;
using namespace catalogue;
using namespace chainmesh;
using namespace data;
using namespace pairs;
using namespace measure;
using namespace twopt;
 
 
// ============================================================================================
 
 
void cbl::measure::twopt::TwoPointCorrelation1D_angular::set_parameters (const BinType binType, const double thetaMin, const double thetaMax, const int nbins, const double shift, const CoordinateUnits angularUnits, std::function<double(double)> angularWeight, const bool compute_extra_info) 
{
  if (!compute_extra_info) 
    m_dd = (binType==BinType::_logarithmic_) ? move(Pair::Create(PairType::_angular_log_, PairInfo::_standard_, thetaMin, thetaMax, nbins, shift, angularUnits, angularWeight))
      : move(Pair::Create(PairType::_angular_lin_, PairInfo::_standard_, thetaMin, thetaMax, nbins, shift, angularUnits, angularWeight));
  else 
    m_dd = (binType==BinType::_logarithmic_) ? move(Pair::Create(PairType::_angular_log_, PairInfo::_extra_, thetaMin, thetaMax, nbins, shift, angularUnits, angularWeight))
      : move(Pair::Create(PairType::_angular_lin_, PairInfo::_extra_, thetaMin, thetaMax, nbins, shift, angularUnits, angularWeight));
  
  m_rr = (binType==BinType::_logarithmic_) ? move(Pair::Create(PairType::_angular_log_, PairInfo::_standard_, thetaMin, thetaMax, nbins, shift, angularUnits))
    : move(Pair::Create(PairType::_angular_lin_, PairInfo::_extra_, thetaMin, thetaMax, nbins, shift, angularUnits));
  
  m_dr = (binType==BinType::_logarithmic_) ? move(Pair::Create(PairType::_angular_log_, PairInfo::_standard_, thetaMin, thetaMax, nbins, shift, angularUnits))
    : move(Pair::Create(PairType::_angular_lin_, PairInfo::_extra_, thetaMin, thetaMax, nbins, shift, angularUnits));
}
 
 
// ============================================================================================
 
 
void cbl::measure::twopt::TwoPointCorrelation1D_angular::set_parameters (const BinType binType, const double thetaMin, const double thetaMax, const double binSize, const double shift, const CoordinateUnits angularUnits, std::function<double(double)> angularWeight, const bool compute_extra_info)
{
  if (!compute_extra_info) 
    m_dd = (binType==BinType::_logarithmic_) ? move(Pair::Create(PairType::_angular_log_, PairInfo::_standard_, thetaMin, thetaMax, binSize, shift, angularUnits, angularWeight))
      : move(Pair::Create(PairType::_angular_lin_, PairInfo::_standard_, thetaMin, thetaMax, binSize, shift, angularUnits, angularWeight));
  else 
    m_dd = (binType==BinType::_logarithmic_) ? move(Pair::Create(PairType::_angular_log_, PairInfo::_extra_, thetaMin, thetaMax, binSize, shift, angularUnits, angularWeight))
      : move(Pair::Create(PairType::_angular_lin_, PairInfo::_extra_, thetaMin, thetaMax, binSize, shift, angularUnits, angularWeight));
  
  m_rr = (binType==BinType::_logarithmic_) ? move(Pair::Create(PairType::_angular_log_, PairInfo::_standard_, thetaMin, thetaMax, binSize, shift, angularUnits))
    : move(Pair::Create(PairType::_angular_lin_, PairInfo::_standard_, thetaMin, thetaMax, binSize, shift, angularUnits));
  
  m_dr = (binType==BinType::_logarithmic_) ? move(Pair::Create(PairType::_angular_log_, PairInfo::_standard_, thetaMin, thetaMax, binSize, shift, angularUnits))
    : move(Pair::Create(PairType::_angular_lin_, PairInfo::_standard_, thetaMin, thetaMax, binSize, shift, angularUnits));
}
 
 
// ============================================================================================
 
 
void cbl::measure::twopt::TwoPointCorrelation1D_angular::read (const string dir, const string file) 
{
  m_dataset->read(dir+file);
}
 
 
// ============================================================================================
 
 
void cbl::measure::twopt::TwoPointCorrelation1D_angular::write (const string dir, const string file, const int rank) const 
{
  vector<double> xx = m_dataset->xx();
 
  checkDim(xx, m_dd->nbins(), "theta");
 
  string header = "[1] angular separation at the bin centre # [2] angular two-point correlation function # [3] error";
  if (m_compute_extra_info) header += " # [4] mean angular separation # [5] standard deviation of the distribution of angular separations # [6] mean redshift # [7] standard deviation of the redshift distribution";
  
  m_dataset->write(dir, file, header, 5, rank);
}
 
 
// ============================================================================================
 
 
void cbl::measure::twopt::TwoPointCorrelation1D_angular::measure (const ErrorType errorType, const string dir_output_pairs, const vector<string> dir_input_pairs, const string dir_output_resample, int nMocks, bool count_dd, const bool count_rr, const bool count_dr, const bool tcount, const Estimator estimator, const double fact, const int seed)
{
  switch (errorType) {
  case(ErrorType::_Poisson_):
    measurePoisson(dir_output_pairs, dir_input_pairs, count_dd, count_rr, count_dr, tcount, estimator, fact);
    break;
  case(ErrorType::_Jackknife_):
    measureJackknife(dir_output_pairs, dir_input_pairs, dir_output_resample, count_dd, count_rr, count_dr, tcount, estimator, fact);
    break;
  case(ErrorType::_Bootstrap_):
    measureBootstrap(nMocks, dir_output_pairs, dir_input_pairs, dir_output_resample, count_dd, count_rr, count_dr, tcount, estimator, fact, seed);
    break;
  default:
    ErrorCBL("unknown type of error!", "measure", "TwoPointCorrelation1D_angular.cpp");
  }
}
 
 
// ============================================================================================
 
 
void cbl::measure::twopt::TwoPointCorrelation1D_angular::measurePoisson (const string dir_output_pairs, const vector<string> dir_input_pairs, const bool count_dd, const bool count_rr, const bool count_dr, const bool tcount, const Estimator estimator, const double fact)
{ 
  // ----------- count the data-data, random-random and data-random pairs, or read them from file ----------- 
  
  count_allPairs(m_twoPType, dir_output_pairs, dir_input_pairs, count_dd, count_rr, count_dr, tcount, estimator, fact);
 
  
  // ----------- compute the angular two-point correlation function ----------- 
 
  if (estimator==Estimator::_natural_)
    m_dataset = correlation_NaturalEstimator(m_dd, m_rr);
  else if (estimator==Estimator::_LandySzalay_)
    m_dataset = correlation_LandySzalayEstimator(m_dd, m_rr, m_dr);
  else
    ErrorCBL("the chosen estimator is not implemented!", "measurePoisson", "TwoPointCorrelation1D_angular.cpp");
}
 
 
// ============================================================================================
 
 
void cbl::measure::twopt::TwoPointCorrelation1D_angular::measureJackknife (const string dir_output_pairs, const vector<string> dir_input_pairs, const string dir_output_resample, const bool count_dd, const bool count_rr, const bool count_dr, const bool tcount, const Estimator estimator, const double fact)
{
  if (dir_output_resample!=par::defaultString && dir_output_resample!="") {
    string mkdir = "mkdir -p "+dir_output_resample;
    if (system(mkdir.c_str())) {}
  }
  
  vector<long> region_list = m_data->region_list();
  size_t nRegions = region_list.size();
 
  vector<vector<double> > xi_SubSamples, covariance;
 
  vector<shared_ptr<Pair> > dd_regions, rr_regions, dr_regions;
  
  count_allPairs_region(dd_regions, rr_regions, dr_regions, m_twoPType, dir_output_pairs, dir_input_pairs, count_dd, count_rr, count_dr, tcount, estimator, fact);
 
  vector<shared_ptr<Data> > data_SS = (estimator==Estimator::_natural_) ? XiJackknife(dd_regions, rr_regions) : XiJackknife(dd_regions, rr_regions, dr_regions);
 
  for (size_t i=0; i<nRegions; i++) {
 
    if (dir_output_resample!=par::defaultString && dir_output_resample!="") {
      string file = "xi_Jackknife_"+conv(i, par::fINT)+".dat";
      string header = "[1] angular separation at the bin centre # [2] angular two-point correlation function # [3] error";
      if (m_compute_extra_info) header += " # [4] mean separation # [5] standard deviation of the separation distribution # [6] mean redshift # [7] standard deviation of the redshift distribution";
      data_SS[i]->write(dir_output_resample, file, header, 10, 0);
    }
 
    vector<double> dd; data_SS[i]->get_data(dd);
 
    xi_SubSamples.push_back(dd);
  }
 
  covariance_matrix(xi_SubSamples, covariance, 1);
 
  if (estimator==Estimator::_natural_)
    m_dataset = correlation_NaturalEstimator(m_dd, m_rr);
  else if (estimator==Estimator::_LandySzalay_)
    m_dataset = correlation_LandySzalayEstimator(m_dd, m_rr, m_dr);
  else
    ErrorCBL("the chosen estimator is not implemented!", "measureJackknife", "TwoPointCorrelation1D_angular.cpp");
 
  m_dataset->set_covariance(covariance);
 
}
 
 
// ============================================================================================
 
 
void cbl::measure::twopt::TwoPointCorrelation1D_angular::measureBootstrap (const int nMocks, const string dir_output_pairs, const vector<string> dir_input_pairs, const string dir_output_resample, const bool count_dd, const bool count_rr, const bool count_dr, const bool tcount, const Estimator estimator, const double fact, const int seed)
{
  if (nMocks<=0)
    ErrorCBL("the number of mocks must be >0!", "measureBootstrap", "TwoPointCorrelation1D_angular.cpp");
 
  if (dir_output_resample!=par::defaultString && dir_output_resample!="") {
    string mkdir = "mkdir -p "+dir_output_resample;
    if (system(mkdir.c_str())) {}
  }
 
  vector<vector<double> > xi_SubSamples, covariance;
 
  vector<shared_ptr<Pair> > dd_regions, rr_regions, dr_regions;
  
  count_allPairs_region(dd_regions, rr_regions, dr_regions, m_twoPType, dir_output_pairs, dir_input_pairs, count_dd, count_rr, count_dr, tcount, estimator, fact);
 
  vector<shared_ptr<Data> > data_SS = (estimator==Estimator::_natural_) ? XiBootstrap(nMocks, dd_regions, rr_regions, seed) : XiBootstrap(nMocks, dd_regions, rr_regions, dr_regions, seed);
 
  for (int i=0; i<nMocks; i++) {
 
     if (dir_output_resample!=par::defaultString && dir_output_resample!="") {
      string file = "xi_Bootstrap_"+conv(i, par::fINT)+".dat";
      string header = "[1] angular separation at the bin centre # [2] angular two-point correlation function # [3] error";
      if (m_compute_extra_info) header += " # [4] mean separation # [5] standard deviation of the separation distribution # [6] mean redshift # [7] standard deviation of the redshift distribution";
      data_SS[i]->write(dir_output_resample, file, header, 10, 0);
    }
 
    vector<double> dd; data_SS[i]->get_data(dd);
 
    xi_SubSamples.push_back(dd);
  }
 
  covariance_matrix(xi_SubSamples, covariance, 0);
 
  if (estimator==Estimator::_natural_)
    m_dataset = correlation_NaturalEstimator(m_dd, m_rr);
  else if (estimator==Estimator::_LandySzalay_)
    m_dataset = correlation_LandySzalayEstimator(m_dd, m_rr, m_dr);
  else
    ErrorCBL("the chosen estimator is not implemented!", "measureBootstrap", "TwoPointCorrelation1D_angular.cpp");
 
  m_dataset->set_covariance(covariance);
 
}