Loop spin grace write

Loop over spins, write a grace intensity file

Open the results.bz2 file.

state.load(state='results.bz2')

from pipe_control.mol_res_spin import return_spin, spin_loop

for spin, spin_id in spin_loop(return_id=True):
    nr = spin_id.split("@")[0].split(":")[1]
    grace.write(x_data_type='relax_times', y_data_type='intensities', spin_id=spin_id, plot_data='value', file='%s.agr'%(nr), dir=None, force=True, norm=False)