34 lines
814 B
C++
34 lines
814 B
C++
//
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// Created by leonarski_f on 18.05.2026.
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//
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#include <cmath>
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#include "CorrelationCoefficient.h"
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void CorrelationCoefficient::Add(double x, double y) {
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sum_x += x;
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sum_y += y;
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sum_x2 += x * x;
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sum_y2 += y * y;
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sum_xy += x * y;
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n_cc++;
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}
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double CorrelationCoefficient::GetCC() const {
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if (n_cc < 2)
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return NAN;
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const double n = static_cast<double>(n_cc);
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const double mean_x = sum_x / n;
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const double mean_y = sum_y / n;
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const double cov = sum_xy / n - mean_x * mean_y;
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const double var_x = sum_x2 / n - mean_x * mean_x;
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const double var_y = sum_y2 / n - mean_y * mean_y;
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if (!(var_x > 0.0 && var_y > 0.0))
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return NAN;
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return cov / std::sqrt(var_x * var_y);
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}
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