rosenbrock.cpp

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#include <string>

#include "../exceptions.h"
#include "../types.h"
#include "base.h"
#include "rosenbrock.h"

namespace pagmo { namespace problem {


rosenbrock::rosenbrock(int n):base(n)
{
        // Set bounds.
        set_lb(-5.0);
        set_ub(10);
}

base_ptr rosenbrock::clone() const
{
        return base_ptr(new rosenbrock(*this));
}

void rosenbrock::objfun_impl(fitness_vector &f, const decision_vector &x) const
{
        const decision_vector::size_type n = x.size();
        f[0]=0;
        for (decision_vector::size_type i=0; i<n-1; ++i){
                f[0] += 100 * (x[i]*x[i] -x[i+1])*(x[i]*x[i] -x[i+1]) + (x[i]-1)*(x[i]-1);
        }
}

std::string rosenbrock::get_name() const
{
        return "Rosenbrock";
}

}}

BOOST_CLASS_EXPORT_IMPLEMENT(pagmo::problem::rosenbrock)