add increment field when first field changes - Shell Programming and Scripting

azekry · #1 11-14-2005

Hi
I have a file that looks like the following:

Name1 aaa bbbb
Name1 ffd hhghg
Name1 dffg ghhhh
Name2 rtrt dfff
Name2 rrtfr tgtt
Name2 dsddf gfggf
Name2 ffffg gfgf
NAme3 fdff ghhgh

Is it possible to format it so that a number increment field is added whenever the first field in a record changes. like that

1 Name1 aaa bbbb
1 Name1 ffd hhghg
1 Name1 dffg ghhhh
2 Name2 rtrt dfff
2 Name2 rrtfr tgtt
2 Name2 dsddf gfggf
2 Name2 ffffg gfgf

Thanks

vgersh99 · #2 11-14-2005

Code:

nawk '$1 != prev {cnt++; prev=$1}{print cnt, $0}' myFile.txt

azekry · #3 11-14-2005

Thanks so much.
This works great.

Appreciate your help

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
Reindex or re-increment last field of txt file.	silenthands	Shell Programming and Scripting	2	11-08-2007 10:43 AM
Retrieve 5th Field to Last Field !!	jobbyjoseph	UNIX for Dummies Questions & Answers	3	05-16-2007 12:20 AM
Moving Part of a field to another field using AWK	rjsha1	Shell Programming and Scripting	5	08-04-2006 02:39 AM
TTL field???	solvman	UNIX for Advanced & Expert Users	11	10-11-2001 09:54 PM
awk sub-field?	kristy	UNIX for Dummies Questions & Answers	2	10-05-2001 01:07 PM

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode