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Count consecutive characters within a cell
assume your data in A1
Create a lookup list A5= AAAA A6= CCCC A7= GGGG A8= TTTT =IF(SUMPRODUCT(--(ISNUMBER(SEARCH(A5:A8,A1))))0,"yes","no") "Jshendel" wrote: I have a genetic sequence such as: AATTCAGTTACTTTTGCA I need a formula that will tell me if this cell has a run of 4 or more consecutive letters. The run can consist of 4 or more A, T, C, or G. The above example can return simply as "yes" or can be as complex as "this cell has 4 consecutive T's" Thanks, Josh |
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