Create a new spin.
spin_name: The name of the spin.
spin_num: The spin number.
res_name: The name of the residue to add the spin to.
res_num: The number of the residue to add the spin to.
mol_name: The name of the molecule to add the spin to.
This will add a new spin data container to the relax data storage object. The same spin number cannot be used more than once.
The following sequence of commands will add the spins 1 C4, 2 C9, 3 C15 to residue number 10:
[numbers=none] relax> spin.create('C4', 1, res_num=10)
[numbers=none] relax> spin.create('C9', 2, res_num=10)
[numbers=none] relax> spin.create('C15', 3, res_num=10)