GenericAverageDeDxEstimator.h

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#ifndef RecoTrackerDeDx_GenericAverageDeDxEstimator_h
#define RecoTrackerDeDx_GenericAverageDeDxEstimator_h

#include "RecoTracker/DeDx/interface/BaseDeDxEstimator.h"
#include "RecoTracker/DeDx/interface/DeDxTools.h"
#include "DataFormats/TrackReco/interface/DeDxHit.h"

class GenericAverageDeDxEstimator : public BaseDeDxEstimator {
public:
  GenericAverageDeDxEstimator(const edm::ParameterSet& iConfig) { m_expo = iConfig.getParameter<double>("exponent"); }

  std::pair<float, float> dedx(const reco::DeDxHitCollection& Hits) override {
    float result = 0;
    size_t n = Hits.size();
    for (size_t i = 0; i < n; i++) {
      result += pow(Hits[i].charge(), m_expo);
    }
    return std::make_pair(((n > 0) ? pow(result / n, 1. / m_expo) : 0.0), -1);
  }

private:
  float m_expo;
};

#endif