Comparison of the RR data for H i among results from this work (black), Seaton (1959, blue), Ferland et al. (1992, orange), and Hummer (1994, red). Both results of case A (solid lines) and case B (dashed lines) are shown. The total RR rates () and electron energy loss rates () are shown in the top two panels. The RR weighted electron energy loss factors (f_{A / B}) are shown in the middle panel. The ratios of f_{A / B} from this work and previous works with respect to the fitting results (Eq. (7) and Table 2) of this work, i.e., , are shown in the bottom two panels.