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group delay option for Y axis

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Jan Käberich 2021-12-10 23:36:28 +01:00
parent 75f4ee245f
commit 0d6dac4969
6 changed files with 99 additions and 36 deletions
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26
Software/PC_Application/Util/util.cpp Normal file
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@ -0,0 +1,26 @@
#include "util.h"
void Util::unwrapPhase(std::vector<double> &phase)
{
for (unsigned int i = 1; i < phase.size(); i++) {
double d = phase[i] - phase[i-1];
d = d > M_PI ? d - 2 * M_PI : (d < -M_PI ? d + 2 * M_PI : d);
phase[i] = phase[i-1] + d;
}
}
void Util::linearRegression(const std::vector<double> &input, double &B_0, double &B_1)
{
double x_mean = (input.size() - 1.0) / 2.0;
double y_mean = std::accumulate(input.begin(), input.end(), 0.0) / input.size();
double ss_xy = 0.0;
for(unsigned int i=0;i<input.size();i++) {
ss_xy += input[i] * i;
}
ss_xy -= input.size() * x_mean * y_mean;
int n = input.size() - 1;
double ss_xx = (1.0/6.0) * n * (n + 1) * (2*n + 1) - input.size() * x_mean * x_mean;
B_1 = ss_xy / ss_xx;
B_0 = y_mean - B_1 * x_mean;
}

6
Software/PC_Application/Util/util.h
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@ -4,6 +4,7 @@
#include <complex>
#include <math.h>
#include <limits>
#include <vector>
#include <QColor>
@ -55,6 +56,11 @@ namespace Util {
auto brightness = q.redF() * 0.299 + q.greenF() * 0.587 + q.blueF() * 0.114;
return brightness > 0.6 ? Qt::black : Qt::white;
}
void unwrapPhase(std::vector<double> &phase);
// input values are Y coordinates, assumes evenly spaced linear X values from 0 to input.size() - 1
void linearRegression(const std::vector<double> &input, double &B_0, double &B_1);
}
#endif // UTILH_H