[R] Solving TSP optimally

Hello, Does anyone know an R package which can solve TSP problem optimally. I checked the TSP package which has heuristic based algorithms so the solution is not guaranteed to be optimal. Of course concorde package is there but it is free only for academic use. So do I have any other option? T

[R] Binary Quadratic Opt?

Hello, I have to solve Binary Quadratic Optimization problem i.e the objective function is quadratic, constraints are linear and variable are binary. I checked the "quadprog" package but it does not seem to be right choice for the problem. Can any one suggest what would be the best package to