Using two different Force Fields in one simulation

Dear LAMMPS users,
I wish to simulate a system by two different Force Fields (for example CHARMM and EAM). How can i do? 
 
Thanks,
Meisam

Dear LAMMPS users,

I wish to simulate a system by two different Force Fields (for example
CHARMM and EAM). How can i do?

see pair_style hybrid

axel.