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Full Discussion: awk remove first duplicates
Top Forums Shell Programming and Scripting awk remove first duplicates Post 302885764 by RavinderSingh13 on Tuesday 28th of January 2014 09:48:25 AM
Old 01-28-2014
Hello,

Following may help.

Code:
awk 'NR==1 {print} f ~ $3 && i == 0 {i++;} f ~ $3 && i > 0 {print $0;i=0;j=1} f !~ $3 && j==1  {print $0} {f=$3;}'  file_name


Output will be as follows.

Code:
12  NIL ABD LON
12  NIL ABC AMR
13  NIL ABC AMR
11  NIL ABK AMR


NOTE: It will work for only this particular Input.


Thanks,
R. Singh

Last edited by RavinderSingh13; 01-28-2014 at 11:06 AM.. Reason: added a note
This User Gave Thanks to RavinderSingh13 For This Post:
 

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COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME
colrm -- remove columns from a file SYNOPSIS
colrm [start [stop]] DESCRIPTION
The colrm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output. If only the start column is specified, columns numbered less than the start column will be written. If both start and stop columns are spec- ified, columns numbered less than the start column or greater than the stop column will be written. Column numbering starts with one, not zero. Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7). EXIT STATUS
The colrm utility exits 0 on success, and >0 if an error occurs. SEE ALSO
awk(1), column(1), cut(1), paste(1) HISTORY
The colrm command appeared in 3.0BSD. BSD
August 4, 2004 BSD
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