def __add__(self, traj):
    '\n        Trajectory addition for joining the coordinates and elements into a new Trajectory object.\n\n        Parameters\n        ----------\n        traj : Trajectory\n            Trajectory object to be added\n\n        Returns\n        -------\n        Trajectory\n            Joined Trajectory object.\n\n        '
    new_traj = Trajectory(atoms=np.append(self.atoms, traj.atoms, axis=0), coordinates=np.append(self.coordinates, traj.coordinates, axis=0))
    return new_traj
Trajectory addition for joining the coordinates and elements into a new Trajectory object.

Parameters
----------
traj : Trajectory
    Trajectory object to be added

Returns
-------
Trajectory
    Joined Trajectory object.
def __add__(self, traj):
    '\n        Trajectory addition for joining the coordinates and elements into a new Trajectory object.\n\n        Parameters\n        ----------\n        traj : Trajectory\n            Trajectory object to be added\n\n        Returns\n        -------\n        Trajectory\n            Joined Trajectory object.\n\n        '
    new_traj = Trajectory(atoms=np.append(self.atoms, traj.atoms, axis=0), coordinates=np.append(self.coordinates, traj.coordinates, axis=0))
    return new_traj