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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Sim/Fitting/FitPrintService.cpp
//! @brief Defines class FitPrintService.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "Sim/Fitting/FitPrintService.h"
#include "Base/Util/StringUtil.h"
#include "Fit/Minimizer/MinimizerResult.h"
#include "Sim/Fitting/FitObjective.h"
#include "Sim/Fitting/IterationInfo.h"
#include <iomanip>
#include <iostream>
#include <sstream>
void FitPrintService::print(const FitObjective& objective)
{
std::ostringstream ostr;
if (objective.isFirstIteration()) {
m_run_time.start();
m_last_call_time.start();
}
ostr << iterationHeaderString(objective);
ostr << parameterString(objective);
if (objective.isCompleted())
ostr << fitResultString(objective);
std::cout << ostr.str() << "\n";
}
std::string FitPrintService::iterationHeaderString(const FitObjective& objective)
{
std::ostringstream result;
m_last_call_time.stop();
result << "Fit iteration " << objective.iterationInfo().iterationCount() << " Chi2 "
<< std::scientific << std::setprecision(8) << objective.iterationInfo().chi2() << " dt "
<< m_last_call_time.runTime() << "\n";
m_last_call_time.start();
return result.str();
}
std::string FitPrintService::parameterString(const FitObjective& objective)
{
std::ostringstream result;
result << "P";
for (const auto& par : objective.iterationInfo().parameters())
result << " " << std::scientific << std::setprecision(6) << par.value();
result << "\n";
return result.str();
}
std::string FitPrintService::fitResultString(const FitObjective& objective)
{
std::ostringstream result;
m_run_time.stop();
result << "This was the last iteration." << std::endl;
result << "Total time spend: " << std::fixed << std::setprecision(2) << m_run_time.runTime()
<< " sec."
<< "\n\n";
result << objective.minimizerResult().toString();
return result.str();
}
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