i have a huge text file consisting of character of DNA i.e ATCG with 21197 lines. each lines have 70 character. MY problem is that i have to extract eg all character between 500 and 1500 character. for that i made a new file removing all \n. then i made use of substr function to extract all cahracter between 500 to 1500 but when i have to extract the chracter between 1490117..1492312 ! the program is not able to extract it............plz help me out......... my text file consist of 1504987 character abd i have to extreact all the character between 1490117..1492312 problem solved by the help of clinton............many many thanks for his help

In reply to text file problem by anonymoushydrogen

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