Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: AWK How to replace a field using 2 shell variables?
Top Forums Shell Programming and Scripting AWK How to replace a field using 2 shell variables? Post 302542772 by danmero on Thursday 28th of July 2011 02:37:00 PM
Old 07-28-2011
Code:
# cat file
F 0
B A
H -12.33
# awk -vSEARCHVAR="B" -vOLDVAL="A" -vNEWVAL=10 '$1==SEARCHVAR && $2==OLDVAL{sub(OLDVAL,NEWVAL,$2)}1' file
F 0
B 10
H -12.33

PS: Please use [code] tags when you post code or data sample.
This User Gave Thanks to danmero For This Post:
basalt
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

search and replace using awk with variables

Hi, I have been trying to use awk with variables that needs to search for a pattern and replace it with another pattern, the patterns are supplied in a variable. I have tried several different ways without success and hope that someone can help me. Here are the details echo $UPC 07007457809... (2 Replies)
Discussion started by: jerardfjay
2 Replies

2. Shell Programming and Scripting

awk to replace particular field

i have bad data for instance, the use of capital letters in the middle of the word. I identified the errors, made a list and put it in a file error_correction.txt Incorrect,Correct VeNOM,Venom nos,NOS . . . My data file looks like this: vgr,bugatti veron,,3.5,Venom,6,.......,....... (14 Replies)
Discussion started by: VGR
14 Replies

3. Shell Programming and Scripting

Awk to replace a field

Hi I am using awk to replace the 4th feild of the input line. My code is below: REP_LINE=$(echo $Line | awk -v var=$REPL_DT '{$4=var; print}') It does replaces but all words/phrases after the 4th feild are erased. Is there a way to modify the 4th feild of the input line and to have all... (7 Replies)
Discussion started by: sugan
7 Replies

4. Shell Programming and Scripting

awk search and replace field

I am writing a c++ program that has many calls of pow(input,2). I now realize that this is slowing down the program and these all should be input * input for greater speed. There should be a simple way of doing this replacement throughout my file with awk, but I am not very familiar with awk.... (2 Replies)
Discussion started by: bluejayek
2 Replies

5. Shell Programming and Scripting

awk how to replace specific field with new value

I need to replace specific field (x) in a table with new value (y): Input: 1 2 3 4 5 x 6 7 8 9 0 0 Output: 1 2 3 4 5 y 6 7 8 9 0 0 I have no idea how to do this. (10 Replies)
Discussion started by: setepo
10 Replies

6. Shell Programming and Scripting

awk search/replace specific field, using variables for regexp & subsitution then overwrite file

Hello, I'm trying the solve the following problem. I have a file which I intend to use as a csv called master.csv The columns are separated by commas. I want to change the text on a specific row in either column 3,4,5 or 6 from xxx to yyy depending upon if column 1 matches a specified pattern.... (3 Replies)
Discussion started by: cyphex
3 Replies

7. Shell Programming and Scripting

AWK replace one field

I have some problem with this. Need to change field #3 to 5 if field #1 = A and filed #2 =B DataA C 6 T C B 4 R A B 3 T D E 5 4 I would like to do two things if statement is true, but can not get it to work. Here it prints column #3 if statement is true, and this works awk '{if... (3 Replies)
Discussion started by: Jotne
3 Replies

8. Shell Programming and Scripting

awk Match First Field and Replace Second Column

Hi Friends, I have looked around the forums and over online but couldn't figure out how to deal with this problem input.txt gene1,axis1/0/1,axis2/0/1 gene1,axis1/1/2,axis2/1/2 gene1,axis1/2/3,axis2/2/3 gene2,axis1/3/4,axis2/3/4 Match on first column and if first column is... (1 Reply)
Discussion started by: jacobs.smith
1 Replies

9. Shell Programming and Scripting

awk to replace a specific field in certain condition

Hi, I have a file like below PRUM,67016800 ,CC ,C1,67016800 , ,Y,Y,2 ,CK,BX,FOX ,00000001,EA,00000001,20141120 00:00:00, ,N,Y,Y,CK ABCDEF... (7 Replies)
Discussion started by: mady135
7 Replies

10. Shell Programming and Scripting

awk to assign points to variables based on conditions and update specific field

I have been reading old posts and trying to come up with a solution for the below: Use a tab-delimited input file to assign point to variables that are used to update a specific field, Rank. I really couldn't find too much in the way of assigning points to variable, but made an attempt at an awk... (4 Replies)
Discussion started by: cmccabe
4 Replies

LEARN ABOUT CENTOS

locale::codes::langvar

Locale::Codes::LangVar(3)				User Contributed Perl Documentation				 Locale::Codes::LangVar(3)

NAME

       Locale::Codes::LangVar - standard codes for language variation identification

SYNOPSIS

	  use Locale::Codes::LangVar;

	  $lvar = code2langvar('acm');		       # $lvar gets 'Mesopotamian Arabic'
	  $code = langvar2code('Mesopotamian Arabic'); # $code gets 'acm'

	  @codes   = all_langvar_codes();
	  @names   = all_langvar_names();

DESCRIPTION

       The "Locale::Codes::LangVar" module provides access to standard codes used for identifying language variations, such as those as defined in
       the IANA language registry.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language
       registry codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language variations. A code set may be specified using either a name, or
       a constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lvar = code2langvar('arevela','alpha');
	  $lvar = code2langvar('arevela',LOCALE_LANGVAR_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of alphanumeric codes from the IANA language registry, such as 'arevela' for Eastern Armenian.

	   This code set is identified with the symbol "LOCALE_LANGVAR_ALPHA".

	   This is the default code set.

ROUTINES

       code2langvar ( CODE [,CODESET] )
       langvar2code ( NAME [,CODESET] )
       langvar_code2code ( CODE ,CODESET ,CODESET2 )
       all_langvar_codes ( [CODESET] )
       all_langvar_names ( [CODESET] )
       Locale::Codes::LangVar::rename_langvar  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangVar::add_langvar  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangVar::delete_langvar  ( CODE [,CODESET] )
       Locale::Codes::LangVar::add_langvar_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangVar::delete_langvar_alias  ( NAME )
       Locale::Codes::LangVar::rename_langvar_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangVar::add_langvar_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangVar::delete_langvar_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.iana.org/assignments/language-subtag-registry
	   The IANA language subtag registry.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.3							    2013-04-12						 Locale::Codes::LangVar(3)
All times are GMT -4. The time now is 08:41 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy