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Full Discussion: duplicate a column with awk
Top Forums Shell Programming and Scripting duplicate a column with awk Post 302590803 by LMHmedchem on Tuesday 17th of January 2012 03:43:39 PM
Old 01-17-2012
duplicate a column with awk

I have some tab delimited data and I need to duplicate the second column. It seems like I should just be able to do something simple in awk like,

Code:
awk '{ print $1, $2, $2, $3 }'

(the second field is the one that needs to be duplicated)

but I'm not sure how to print from $3 to the end of the line ($3-$NF???) and I'm not sure how the tabs will be preserved.

LMHmedchem

Last edited by radoulov; 01-17-2012 at 04:56 PM.. Reason: Use code tags, please!
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWgawk | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+ NOTES
Source for gawk is available on http://opensolaris.org. Free Software Foundation Nov 3 1999 IGAWK(1)
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