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qEcho/source/median.h

27 lines
528 B
C++

#pragma once
#include <vector>
#include <algorithm>
template<typename VALUE_TYPE>
double median(std::vector<VALUE_TYPE> values)
{
if (values.size() == 0)
{
return 0.0;
}
size_t centerIndex = values.size() / 2;
std::nth_element(values.begin(), values.begin() + centerIndex, values.end());
if (values.size() % 2 == 1)
{
return values[centerIndex];
}
else
{
std::nth_element(values.begin(), values.begin() + centerIndex + 1, values.end());
return (values[centerIndex] + values[centerIndex + 1]) / 2.0;
}
}