qlat_utils.mk_r_sq_interp_idx_coef_list

qlat_utils.mk_r_sq_interp_idx_coef_list(r_list)

Return a list of tuples:

r_sq_interp_idx_coef_list = [ (r_idx_low, r_idx_high, coef_low, coef_high,), ... ] where: r_sq_interp_idx_coef_list[r_sq] = (r_idx_low, r_idx_high, coef_low, coef_high,) r_sq ranges from 0 to int(r_list[-1]**2 + 1.5)