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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Tests/Functional/Mumufit/ResidualTestPlan.cpp
//! @brief Implements class ResidualTestPlan.
//!
//! @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 "Tests/Functional/Mumufit/ResidualTestPlan.h"
#include "Fit/Kernel/Minimizer.h"
#include <cassert>
#include <iostream>
#include <utility>
using namespace mumufit;
ResidualTestPlan::ResidualTestPlan(const std::string&, const test_funct_t& func)
: m_test_func(func)
{
m_xvalues.resize(101);
for (int i = 0; i <= 100; ++i)
m_xvalues[i] = i * 0.1;
}
fcn_residual_t ResidualTestPlan::residualFunction() const
{
return [&](mumufit::Parameters pars) -> std::vector<double> { return evaluate(pars.values()); };
}
bool ResidualTestPlan::checkMinimizer(Minimizer& minimizer) const
{
auto result = minimizer.minimize(residualFunction(), parameters());
std::cout << result.toString() << std::endl;
return valuesAsExpected(result.parameters().values());
}
void ResidualTestPlan::finalizeParameters()
{
std::vector<double> pars;
pars.reserve(m_parameter_references.size());
for (const auto& plan : m_parameter_references)
pars.push_back(plan.expected_value);
for (auto x : m_xvalues)
m_data_values.push_back(m_test_func(x, pars));
}
std::vector<double> ResidualTestPlan::evaluate(const std::vector<double>& pars) const
{
assert(!m_data_values.empty());
std::vector<double> result;
for (size_t i = 0; i < m_xvalues.size(); ++i)
result.push_back(m_test_func(m_xvalues[i], pars) - m_data_values[i]);
return result;
}
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