Comparison of the accuracy of the estimated true-z distribution obtained with different SC algorithms. Upper panel: ${\displaystyle \sum _i}|{\widehat{P}}_{ij\prime }-P_{ij\prime }^{\mathrm{true}}|$, the absolute difference between the true-z distribution measured from the mock, P_ij′^true and the estimated one, ${\widehat{P}}_{ij\prime }$. Lower panel: ${\displaystyle \sum _i}|{\widehat{P}}_{ij\prime }-P_{ij\prime }^{\mathrm{true}}|/{\sigma }_{P_{ij\prime }}$ the absolute difference normalized by the estimated error σ_Pij′. In both panels, the results from R method (red), P method (orange), and Old NMF (blue) are compared. The line and color band represent the median and the 16 and 84 percentiles among 100 mock runs. The results for five tomographic bins are shown.