Skip to main content
Figure 8 | BMC Bioinformatics

Figure 8

From: BicSPAM: flexible biclustering using sequential patterns

Figure 8

Comparison of strategies to handle missing values. In relaxed settings to handle missing values, the column index where a missing occurs is included as a co-occurrence in all positions of the respective sequence. Illustrating, s1 = y3y2 is mapped as y1(y1y3)(y1y2)y1. δ-replace setting is a more conservative alternative as it considers the inclusion of its index only in positions differing less that δ from its value-estimation. If a1,1 is estimated to have value 1.5 and δ=0.5, then a1,1{1,2} and (since y3 = 1 and y2 = 2) s1 is defined as (y1y3)(y1y2). Finally, the more conservative method, restrictive setting, removes missing items from the corresponding transactions.

Back to article page