how can i make a code for file that look like this... 
pattern.txt

AT1G48210
AT1G48240
AT1G48260
AT1G48330
AT1G48370
AT1G48440
AT1G48450
AT1G01073

[download]
data.txt 
AT1G01010    Bra033296    .    .
AT1G01020    Bra033295    .    .
AT1G01030    Bra033294    .    .
AT1G01040    Bra033293    .    .
AT1G01046    .    .    .
AT1G01050    Bra033292    Bra032616    .
AT1G01060    Bra033291    .    .
AT1G01070    Bra033290    Bra032617    .
AT1G01073    .    .    .
AT1G01080    Bra033287    .    .
AT1G01090    Bra033286    Bra032619    .
AT1G01100    Bra033285    Bra032620    .
AT1G01110    Bra033284    .    .
AT1G01115    .    .    .
AT1G01120    Bra033283    Bra032621    .
AT1G01130    Bra033282    Bra032622    .
AT1G01140    Bra033282    Bra032622    .
AT1G01150    .    .    .
AT1G01160    Bra033281    Bra032623    .
AT1G01170    Bra033280    .    .
AT1G01180    Bra033279    .    .
AT1G01183    .    .    .
AT1G01190    Bra033278    Bra032624    .

[download]
and i need to find the lines with "dots" only and pull out the sequences above and below that have atleast one "Bra...." rather than "dot" which is most closer to the line with only "dots". In the file there can be more than one lines closer which have only "dots". plss help... Im so stuck!!

In reply to Re^2: Pattern matching across two files, Need something better than grep -f! by Anonymous Monk
in thread Pattern matching across two files, Need something better than grep -f! by anasuya

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