SkewFunc.hh
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/*
* SkewFunc.hh
*
* Created on: Jun 23, 2018
* Author: benjamin
*/
#ifndef SKEWFUNC_HH_
#define SKEWFUNC_HH_
#include "AbstractFunc.hh"
#include "Toolbox.hh"
namespace AMDA {
namespace Parameters {
namespace StatisticFunctions {
template <typename InputElemType, typename OutputElemType>
OutputElemType computeSkew(std::list<std::pair<double,InputElemType>>& mem, OutputElemType& nanVal) {
OutputElemType result = nanVal;
if (mem.empty()) {
return result;
}
result << ElemNull();
OutputElemType mean = result;
int n = 0;
for (auto val : mem) {
if (isNAN(val.second))
continue;
mean = mean+val.second;
++n;
}
if (n == 0) {
result << NotANumber();
return result;
}
mean = 1./n*mean;
OutputElemType m3 = result;
OutputElemType m2 = result;
for (auto val : mem) {
m3 = m3 + StatisticFunctions::pow((val.second - mean),3);
m2 = m2 + StatisticFunctions::square((val.second - mean));
}
m3 = 1./n*m3;
m2 = 1./n*m2;
result = StatisticFunctions::div(m3,StatisticFunctions::pow(m2,1.5));
return result;
}
/**
* @class SkewFunc
* @brief
* @details This class implements AbstractFunc.
*/
template <typename InputElemType, typename OutputElemType>
class SkewFunc : public ClassicAbstractFunc<InputElemType,OutputElemType> {
public:
/**
* @brief Constructor.
*/
SkewFunc(Process& pProcess, TimeIntervalListSPtr pTimeIntervalList, ParamDataSpec<InputElemType>& paramInput, double windowtime)
: ClassicAbstractFunc<InputElemType,OutputElemType>(pProcess, pTimeIntervalList, paramInput, windowtime) {
}
virtual ~SkewFunc() {
}
OutputElemType compute() {
return computeSkew(ClassicAbstractFunc<InputElemType,OutputElemType>::_mem, ClassicAbstractFunc<InputElemType,OutputElemType>::_nanVal);
}
};
/**
* @class SkewFuncSm
* @brief
* @details This class implements AbstractFunc.
*/
template <typename InputElemType, typename OutputElemType>
class SkewSmFunc : public SmAbstractFunc<InputElemType,OutputElemType> {
public:
/**
* @brief Constructor.
*/
SkewSmFunc(Process& pProcess, TimeIntervalListSPtr pTimeIntervalList, ParamDataSpec<InputElemType>& paramInput, double windowtime)
: SmAbstractFunc<InputElemType,OutputElemType>(pProcess, pTimeIntervalList, paramInput, windowtime) {
}
virtual ~SkewSmFunc() {
}
OutputElemType compute() {
return computeSkew(SmAbstractFunc<InputElemType,OutputElemType>::_mem, SmAbstractFunc<InputElemType,OutputElemType>::_nanVal);
}
};
} /* namespace StatisticFunctions */
} /* namespace Parameters */
} /* namespace AMDA */
#endif /* SKEWFUNC_HH_ */