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 goal was to classify each fragment as either coding or non-coding. This was accomplished by analyzing corresponding segments of equal size, then evaluating the degree of similarity between them using the mutual information function.