Unix/Linux Go Back    


Shell Programming and Scripting BSD, Linux, and UNIX shell scripting — Post awk, bash, csh, ksh, perl, php, python, sed, sh, shell scripts, and other shell scripting languages questions here.

Copying first column to be second column

Shell Programming and Scripting


Closed    
 
Thread Tools Search this Thread Display Modes
    #1  
Old Unix and Linux 12-04-2012
narachaid narachaid is offline
Registered User
 
Join Date: Sep 2012
Last Activity: 28 October 2013, 1:09 PM EDT
Posts: 21
Thanks: 9
Thanked 0 Times in 0 Posts
Copying first column to be second column

Hi guys,

Does anyone know how to copy the first column and paste it as the second column in a file? Linux

For example:

Input:

Code:
A  1  3
B  3  7
C  5  2
D  9  4

Output:

Code:
A  A  1  3
B  B  3  7
C  C  5  2
D  D  9  4

Thank you very much!!

Last edited by Franklin52; 12-05-2012 at 04:11 AM.. Reason: Please use code tags for data and code samples
Sponsored Links
    #2  
Old Unix and Linux 12-04-2012
bartus11's Unix or Linux Image
bartus11 bartus11 is offline
Registered User
 
Join Date: Apr 2009
Last Activity: 3 August 2016, 11:03 AM EDT
Posts: 3,733
Thanks: 7
Thanked 1,152 Times in 1,122 Posts
Try:
Code:
awk '{$1=$1" "$1}1' file

Sponsored Links
    #3  
Old Unix and Linux 12-04-2012
narachaid narachaid is offline
Registered User
 
Join Date: Sep 2012
Last Activity: 28 October 2013, 1:09 PM EDT
Posts: 21
Thanks: 9
Thanked 0 Times in 0 Posts
Thank you very much!! Linux
    #4  
Old Unix and Linux 12-04-2012
itkamaraj's Unix or Linux Image
itkamaraj itkamaraj is offline Forum Advisor  
Registered User
 
Join Date: Apr 2010
Last Activity: 17 July 2017, 6:20 AM EDT
Posts: 3,144
Thanks: 43
Thanked 694 Times in 670 Posts

Code:
$ awk '$2=$1" "$2' a.txt
A A 1 3
B B 3 7
C C 5 2
D D 9 4

Sponsored Links
    #5  
Old Unix and Linux 12-04-2012
rdrtx1 rdrtx1 is offline
Registered User
 
Join Date: Sep 2012
Last Activity: 16 July 2017, 8:51 PM EDT
Location: Houston, Texas, USA
Posts: 933
Thanks: 0
Thanked 313 Times in 298 Posts
try also:

Code:
sed 's/\([^ ]*\).*/\1 &/' input


Code:
awk '{print $1,$0}' input

Sponsored Links
Closed

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Linux More UNIX and Linux Forum Topics You Might Find Helpful
Thread Thread Starter Forum Replies Last Post
Rename a header column by adding another column entry to the header column name Vavad UNIX for Dummies Questions & Answers 1 08-06-2011 01:02 PM
Rename a header column by adding another column entry to the header column name URGENT!! Vavad Shell Programming and Scripting 4 08-05-2011 12:35 PM
Match column 3 in file1 to column 1 in file 2 and replace with column 2 from file2 rydz00 Shell Programming and Scripting 7 11-09-2010 10:28 AM
Changing one column of delimited file column to fixed width column manneni prakash Shell Programming and Scripting 5 06-22-2009 05:27 AM
How to check Null values in a file column by column if columns are Not NULLs Mandab Shell Programming and Scripting 7 03-15-2008 09:57 AM



All times are GMT -4. The time now is 06:42 PM.