# Context This example tests the dynamical friction implemented in the MWPotential2014. It compares the orbit predicted by SWIFT with an orbit computed with pNbody, using: `orbits_integration_MW --t_forward 10 --position 0.1 0.1 100 --velocity 80 0 0 --dynamical_friction -o orbit.csv` # How to run this example In a terminal at the root of the "swiftsim" directory, type: `./autogen.sh` Then, configure swift to take into account external potentials. Type: `./configure --with-ext-potential=MWPotential2014` Feel free to adapt other configurations parameters depending on your system. Then, build the code by typing: `make` Finally, to run this example, open a terminal in the present directory and type: `./run.sh` In this last command run Swift run on two different parameter files, params_unit_1.yml and params_unit_2.yml. Those two sets of parameters only differ by the choice of the internal units. This allow to test the correct units conversion of all parameters involved.