LArPcaHelper.h

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#ifndef LAR_PCA_HELPER_H
#define LAR_PCA_HELPER_H 1

#include "Objects/CartesianVector.h"

#include <vector>

namespace lar_content
{

class LArPcaHelper
{
public:
    typedef pandora::CartesianVector EigenValues;
    typedef std::vector<pandora::CartesianVector> EigenVectors;
    typedef std::pair<const pandora::CartesianVector, double> WeightedPoint;
    typedef std::vector<WeightedPoint> WeightedPointVector;

    template <typename T>
    static void RunPca(const T &t, pandora::CartesianVector &centroid, EigenValues &outputEigenValues, EigenVectors &outputEigenVectors);

    static void RunPca(const WeightedPointVector &pointVector, pandora::CartesianVector &centroid, EigenValues &outputEigenValues,
        EigenVectors &outputEigenVectors);
};

} // namespace lar_content

#endif // #ifndef LAR_PCA_HELPER_H