Ionization condition diagnostic of the emission line excess found in the nuclear regions of RDAGN hosts (green circle) as well as the deficiency found in the outskirts (green square). The green upper limits on σ_Hα are due to the unknown level of line broadening after stacking the spectra. The background grayscale map is the distribution of the [N II]/Hα vs σ_Hα for the whole MaNGA sample. Star-forming-like emission and AGN or shock-dominated emission regions as classified in the BPT diagram are plotted as blue and red contours, respectively. The red arrow indicates the direction in which the ionization becomes harder due to the AGN or shock contribution. In RDAGN hosts, the line ratio suggests that the nuclear emission line excess is created by AGN or shocks, while weaker star formation may be the reason for the emission line deficiency in the outskirts.