hii all
i have a file a which contains some thing like this
0 yyx 3020
1 yyw 10,000
now i have another file (file2) which contains the characters say abceffredd.... starting from 1 to n positions i want to refer first file if 0 appears it should go to eg 3020 position in file 2 and see for a pattern match say $abc at 250 characters after 3020 (i,e., 3270). if 1 appears it shud go 250 characters before 3020 and search for the pattern $abc. what should be done for it. i think use of substring 
 $pos1=$pos-250;
    $seq250 = substr($sequence,$pos1,250);

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would help me but not really able to derive it

In reply to matchin a pattern 250 characters up and down stream by Anonymous Monk

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