Calculate the PCS Q factor for the selected spins.
spin_id: The spin ID string for restricting to subset of all selected spins.
verbosity: The amount of information to print out. Set to zero to silence the user function, or one to see all messages.
For this to work, the back-calculated PCS data must first be generated by the analysis specific code. Otherwise a warning will be given.
To calculate the PCS Q factor for only the spins `@H26', `@H27', and `@H28', type one of:
[numbers=none] relax> pcs.calc_q_factors('@H26 & @H27 & @H28')
[numbers=none] relax> pcs.calc_q_factors(spin_id='@H26 & @H27 & @H28')