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Extended Data Fig. 1 | Cumulative probability distribution of memristor
conductance for the remaining seven 2,048-cell arrays. The red circles
highlight abnormal data points, which deviate from their target conductance
ranges owing to device variations. a, The 32-level conductance distribution on
an entire 2,048-cell array. b–g, Conductance distributions for the first 32 rows
of memristors (namely, 512 devices) for each of the remaining 2,048-cell arrays.
A small number of writing errors were observed during the programming
procedure (red circles), which could be attributed to device variations. These
results show good consistency with Fig. 1c.