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Letter count in sequence

User: "BDk"
BDk
New Altair Community Member
Updated by Jocelyn
Hi, I'm quite new with the software. I would like to count the number of letter in a random sentence (e.g.:GGGAATCGTCA), e.g. how many 'A' occurred in it and put it into a new column. Is there some operator that could be used for it?  Thank you in advance!

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