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LossFunctions.cpp
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LossFunctions.cpp
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#include "LossFunctions.h"
namespace WhydahGally
{
namespace Maths
{
//Simple loss function.
std::vector<float> lossFunctSimple(const std::vector<float>& x, const std::vector<float>& y)
{
return vectorsDifference(x, y);
}
std::vector<float> lossFunctSimple(const std::vector<std::vector<float>>& x, const std::vector<float>& y)
{
return matrixVectorDifference(x, y);
}
//Logarithmic loss function.
std::vector<float> lossFunctLog(const std::vector<float>& x, const std::vector<float>& y)
{
std::vector<float> results;
results.resize(x.size());
for (int i = 0; i < x.size(); ++i)
{
results.at(i) = (-((y[i] * log(x[i])) + ((1 - y[i]) * log(1 - x[i])))) * sign(x[i] - y[i]);
}
return results;
}
std::vector<float> lossFunctLog(const std::vector<std::vector<float>>& x, const std::vector<float>& y)
{
std::vector<float> results;
results.resize(x.size());
for (int i = 0; i < x.size(); ++i)
{
results.at(i) = (-((y[i] * log(x[i][0])) + ((1 - y[i]) * log(1 - x[i][0])))) * sign(x[i][0] - y[i]);
}
return results;
}
//Cubic logarithmic loss function.
std::vector<float> lossFunctLogPow3(const std::vector<float>& x, const std::vector<float>& y)
{
std::vector<float> results;
results.resize(x.size());
for (int i = 0; i < x.size(); ++i)
{
results.at(i) = pow((-((y[i] * log(x[i])) + ((1 - y[i]) * log(1 - x[i])))) * sign(x[i] - y[i]), 3);
}
return results;
}
std::vector<float> lossFunctLogPow3(const std::vector<std::vector<float>>& x, const std::vector<float>& y)
{
std::vector<float> results;
results.resize(x.size());
for (int i = 0; i < x.size(); ++i)
{
results.at(i) = pow((-((y[i] * log(x[i][0])) + ((1 - y[i]) * log(1 - x[i][0])))) * sign(x[i][0] - y[i]), 3);
}
return results;
}
//Cubic loss function.
std::vector<float> lossFunctPow3(const std::vector<float>& x, const std::vector<float>& y)
{
std::vector<float> results;
results.resize(x.size());
for (int i = 0; i < x.size(); ++i)
{
results.at(i) = pow(x[i] - y[i], 3);
}
return results;
}
std::vector<float> lossFunctPow3(const std::vector<std::vector<float>>& x, const std::vector<float>& y)
{
std::vector<float> results;
results.resize(x.size());
for (int i = 0; i < x.size(); ++i)
{
results.at(i) = pow(x[i][0] - y[i], 3);
}
return results;
}
//Cubic plus cubic logarithmic loss function.
std::vector<float> lossFunctPow3PLogPow3(const std::vector<float>& x, const std::vector<float>& y)
{
std::vector<float> results;
results.resize(x.size());
for (int i = 0; i < x.size(); ++i)
{
results.at(i) = pow(x[i] - y[i], 3) + pow((-((y[i] * log(x[i])) + ((1 - y[i]) * log(1 - x[i])))) * sign(x[i] - y[i]), 3);
}
return results;
}
std::vector<float> lossFunctPow3PLogPow3(const std::vector<std::vector<float>>& x, const std::vector<float>& y)
{
std::vector<float> results;
results.resize(x.size());
for (int i = 0; i < x.size(); ++i)
{
results.at(i) = pow(x[i][0] - y[i], 3) + pow((-((y[i] * log(x[i][0])) + ((1 - y[i]) * log(1 - x[i][0])))) * sign(x[i][0] - y[i]), 3);
}
return results;
}
}
}