They then sought to characterize each of these fragments as either coding or non-coding. This was accomplished by comparing each size 3 window along the length of a fragment with the first size 3 window in that fragment, then measuring the value of the mutual information function between the two windows.
The objective was to differentiate between fragments that contained coding and those that did not. To achieve this, they compared adjacent sections of a given length, specifically matching every third element within each segment with its initial counterpart, and assessing the connection between these elements through the mutual information metric.