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Full Discussion: Replace 0 with 1 in multiple fields with awk
Top Forums Shell Programming and Scripting Replace 0 with 1 in multiple fields with awk Post 302933009 by RavinderSingh13 on Tuesday 27th of January 2015 02:23:59 AM
Old 01-27-2015
yes MadeinGermany, I have given code as user didn't specify that. User told he/she wants to replace all zeros, so only I have given gsub.

Hello Rabu,

Change the second solution to as follows, if you need only single 0 to be renamed then following may help.

Code:
awk '{if(length($2)==1){sub("0","1",$2)};if(length($4)==1){sub("0","1",$4)}} 1' OFS="\t"  Input_file

OR
If you want to change all only zeros in $2 and $4 which may have more than one length following may help.
Code:
awk '{if($2==0){gsub("0","1",$2)};if($4==0){gsub("0","1",$4)}} 1' OFS="\t"  Input_file


EDIT: Adding solution for Rabu's latest post for chaging every even field's zero to one, again considering that all fields have only one digit values.
Code:
awk '{for(i=1;i<=NF;i++){if(i%2==0){sub("0","1",$i)}}} 1' OFS="\t"  Input_file

Hope this helps you.

Thanks,
R. Singh
Last edited by RavinderSingh13; 01-27-2015 at 03:35 AM.. Reason: Added a solution as per user's latest post
This User Gave Thanks to RavinderSingh13 For This Post:
Rabu
 

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LEARN ABOUT OPENSOLARIS

igawk

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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