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Re^3: output unique lines only

by l3v3l (Monk)
on Dec 06, 2005 at 19:05 UTC ( #514602=note: print w/replies, xml ) Need Help??


in reply to Re^2: output unique lines only
in thread output unique lines only

the only reason to use sort and uniq in combination instead of "sort -u" that I can think of is to skip specific columns when looking for unique intances. example:
... RH_MEa0001bG06_5 710 14 16 Invalid starting position (14) RH_MEa0001bG06_4 710 125 12 GGGGGACACCTTCTCTCTCT... RH_MEa0001bG06_6 710 125 12 GGGGGACACCTTCTCTCTCT... ...
sending a file containing this output to " | sort | uniq -f1" would compare each line and take the first instance that is unique (other than the column you want to skip, column 1 in this case) up to that point and give you :
... RH_MEa0001bG06_4 710 125 12 GGGGGACACCTTCTCTCTCT... RH_MEa0001bG06_5 710 14 16 Invalid starting position (14) ...

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