Hi, I was looking to find a package/function that would calculate the expected value/frequency of finding a subsequence, within a sequence of length L. For example, assuming that all nucleotides are equally probable, how many times would we expect to find the pattern 'ATTG' in a sequence of length = 20. I tried looking in biostrings and IRanges, but didn't find what I was looking for. many thanks! [[alternative HTML version deleted]]