Figure 1
From: Computing distribution of scale independent motifs in biological sequences
Illustration of the unidirectional USM procedure for the sequence, "ACTGCCC". For a nucleotide sequence, it consists of two iterative CGR operations in each direction, forward and reverse. The circled symbol indicates the first position iterated – see text for discussion on determination of seeding position. Each subsequent position is calculated moving half the distance to the edge with the corresponding unit. As shown in [3] the density of points in the unitary square is a generalization of Markov transition matrices.