Undefined function v2u and u2v in get_transport_func.m

croco tools (pre/post-processing)
1

I would like to use the function get_transport_func.m in croco_tools/Diagonostic_tools/Transport, it asks me for the function v2u and u2v (needed in get_a.m) and I do not have it in the folder.

2

I used the u_rho2d and rho2v_2d commands to make u2v