If I have a few oligonucleotide sequences and I want to determine the consensus sequence and put it in a bits vs sequence position graph. How is bits vs nucleotide position graph made? Like the ones where the nucleotide letters are made big or small in size depending on the frequency of its appearance in the sequences analyzed. What type of software is used to make these? Can anybody please explain this to me in details.
P.S.: Please have a look at the attached example graph from Wikipedia if my query is not clear.