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Estimator.cpp
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Estimator.cpp
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/*
* Author: Kyle Beyer
* Last Updated: 11/30/17
*
*/
#include <cmath>
#include "Estimator.h"
// functions
void Estimator::endHist() {
// set the current history tally and square tally running sums
histTally += currentHistTally;
histTallySqr += pow( currentHistTally , 2 );
// set the current hist tally to 0
currentHistTally = 0;
};
void Estimator::score(double val) {
currentHistTally += val;
};
std::pair < double , double > Estimator::getScalarEstimator(unsigned long long nHist) {
// return the mean and std deviation in the score in each history
// of whatever is being tallied
std::pair < double , double > estimate;
if (nHist > 1) {
// find the standard deviation of the estimator
double stdDev = sqrt( ( 1.0 / (nHist-1) ) * ( histTallySqr - ( 1.0 / nHist ) * pow( histTally , 2 ) ) );
estimate.first = histTally / nHist;
estimate.second = stdDev;
}
else {
std::cout << "Not enough histories to calculate variance! Tallies unreliable." << std::endl;
estimate.first = 0.0;
estimate.second = 0.0;
}
return(estimate);
};
/*
*
//functions
void SurfaceFluxTally::score( double mu ) {
currentHistTally += 1.0 / mu;
};
//functions
void CollisionTally::score( double xs ) {
currentHistTally += 1.0 / xs;
};
*/