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uvos
2021-07-17 22:24:44 +02:00
parent 42da1746b5
commit 3c788f57c2
20 changed files with 1168 additions and 7 deletions
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34
src/regessioncalculator.cpp Executable file
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#include "regessioncalculator.h"
#include <stdexcept>
#include <math.h>
#include <QDebug>
RegessionCalculator::RegessionCalculator(const std::vector<double>& xValues, const std::vector<double>& yValues)
{
if(xValues.size() == yValues.size())
{
this->xValues = xValues;
this->yValues = yValues;
double sumY = 0;
double sumX = 0;
double sumXTimesY = 0;
double sumSquaredX = 0;
double sumSquaredY = 0;
for (unsigned i = 0; i < xValues.size(); i++)
{
sumY += yValues[i];
sumX += xValues[i];
sumSquaredX += xValues[i]*xValues[i];
sumSquaredY += yValues[i]*yValues[i];
sumXTimesY += xValues[i]*yValues[i];
}
slope = (sumXTimesY - (sumX*sumY)/xValues.size()) / (sumSquaredX - (sumX*sumX)/xValues.size());
offset = sumY/xValues.size() - slope*(sumX/xValues.size());
double error = (xValues.size()*sumSquaredY-sumY*sumY-slope*slope*(xValues.size()*sumSquaredX-sumX*sumX)) / (xValues.size()*(xValues.size()-2));
stdError = sqrt( (error*error*xValues.size() ) / ( xValues.size()*sumSquaredX-sumX*sumX));
}
else throw std::invalid_argument("xValues and yValues need to be the same size");
}