Short Tandem Repeats are currently used by law enforcement and others, for example, for the identification of individuals by DNA matching. A method is described herein that uses WPD to classify and identify repeating sequences in nucleotide sequences from the position and frequency information contained within nucleotide sequences. This decomposition allows for the quick classification of nucleotide sequences (i.e., reads) into two different classes, including, for example, one class that contains sequencer reads that contain a repeat motif with non-repeat sequence on either flank, and another class that contains sequencer reads that do not contain any repeat sequence.