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Smoothing the LV graph by increasing the increment in the iterative bottom–up segmentation from 1 (C), to 10 (B) and 100 (A). As small variations on the graphs are successively smoothed from C to A, the equivalents of sill (shown by dashed vertical lines) occur at increasing values of SP (80 in C, 181 in B, and 901 in A). The equivalents of sill in smoothed graphs (B and A) approximate prominent peaks on the graph obtained with an increment of 1 (C), as indicated by the two arrows.
