unix command for grouping....
I have this type of output which has been previously sorted for example,
A 1
A 2
A 3
A 1
B 2
B 3
C 2
But now i want to remove the A, B, & C using cut but separate the groups so i will still be able to identify the numbers that belong to each letter for example a line to separate each group....
is there some command to do this or some method???
thanks in advance
scripting
not command line... if so then it would look UGLY like
grep "pattern" | cut "patter"; cp ...;... ... | ...;...
really long...
Perl would be the best way to go about it.
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Hi!
We'll have to advertise the awk filter!
(I just replied to similar question)
awk '{if(NR>1 && x!=$1) print ""; print $2; x=$1}' groupfile
is this what you want?
alex
