euclid.h

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#pragma once
#include <boost/numeric/ublas/vector.hpp>
#include <boost/numeric/ublas/vector_expression.hpp>

namespace algo { namespace math {
    template <typename E>
    double calculateSumOfSquares(const 
        boost::numeric::ublas::vector_expression<E>& x)
    {
        double sum = 0.0;
        for (std::size_t i = 0; i < x().size(); ++i) {
            sum += (x()(i) * x()(i));
        }
        return sum;
    }
    double calculateDistanceNormL2(
        const boost::numeric::ublas::vector<double>& x1,
        const boost::numeric::ublas::vector<double>& x2);
    double calculateNormL2(
        const boost::numeric::ublas::vector<double>& x);
} } // namespace algo { namespace math {