Hello
I have 2 columns of short sequences that I would like to compare and count the number of mismatches and  record the  number of mismatches in a new column. The sequences are part of a data frame that looks like this:
seq1=c("CGGTGTAGAGGAAAAAAAGGAAACAGGAGTTC","CGGTGGTCAGTCTGGGACCTGGGCAGCAGGCT", "CGGGCCTCTCGGCCTGCAGCCCCCAACAGCCA")
seq2=c("AGGTGTAGAGGAAAAAAAGGAAACAGGAGTTC","CAGTGGTCAGTCTGGGACCTGGGCATCAGGCT", "CGGGCCTCTCGGCCTGCAGCCCCCAACAGCCA")
d.f=data.frame(seq1, seq2)
thank you for your help
Joseph






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