35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
// SPDX-FileCopyrightText: 2025 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
|
|
// SPDX-License-Identifier: GPL-3.0-only
|
|
|
|
// SPDX-FileCopyrightText: 2025 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
|
|
// SPDX-License-Identifier: GPL-3.0-only
|
|
|
|
#include "FitProfileRadius.h"
|
|
#include <algorithm> // std::nth_element
|
|
#include <cmath> // std::fabs
|
|
|
|
std::optional<float> FitProfileRadius_MAD(const std::vector<SpotToSave>& xs) {
|
|
std::vector<float> absx;
|
|
absx.reserve(xs.size());
|
|
for (const auto &s: xs) {
|
|
if (s.indexed)
|
|
absx.push_back(std::fabs(s.dist_ewald_sphere));
|
|
}
|
|
|
|
if (absx.empty())
|
|
return std::nullopt;
|
|
|
|
std::nth_element(absx.begin(), absx.begin() + absx.size() / 2, absx.end());
|
|
float med;
|
|
if (absx.size() % 2 == 1) {
|
|
med = absx[absx.size() / 2];
|
|
} else {
|
|
auto it1 = absx.begin() + (absx.size() / 2 - 1);
|
|
auto it2 = absx.begin() + (absx.size() / 2);
|
|
float a = *it1;
|
|
float b = *it2;
|
|
med = 0.5f * (a + b);
|
|
}
|
|
// Normal consistency factor for MAD
|
|
return 1.4826f * med;
|
|
} |