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Top Forums Shell Programming and Scripting Trying to get an awk script to replace values in column Post 302995521 by jim mcnamara on Thursday 6th of April 2017 11:25:47 PM
Old 04-07-2017
Your awk code cannot work the way it is.
To pass variables in to an awk script:
the syntax is
awk -v variablename="value"
Example:
Code:
#!/bin/bash
var1="hi there"
awk -v var="$var1" '{print var, $0}' myinputfile

You need 3 of these: one for var var2 and var3. You canruse the names var1, var2, and var3 for the awk internal variables to make your code clear; awk internal variables are unaware of shell variables.

Note {1..4}.txt ->
indicates five files to read, one named Node, 4 named [number].txt - none of these will ever be written to.

Suggestion - Please do not show us what you want to code, lets us see what you are trying to do. Your code is really, um, impossible as presented. There are so many other things that can not work.

-- Edit: Scrutinizer said the same things. Smilie
 

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English(3pm)						 Perl Programmers Reference Guide					      English(3pm)

NAME
English - use nice English (or awk) names for ugly punctuation variables SYNOPSIS
use English; use English qw( -no_match_vars ) ; # Avoids regex performance penalty # in perl 5.16 and earlier ... if ($ERRNO =~ /denied/) { ... } DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get triggered just by accessing them (like $0) will still be affected. For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module. See perlvar for a complete list of these. PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if your code is to run on perl 5.18 or earlier. This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing use English qw( -no_match_vars ) ; . It is especially important to do this in modules to avoid penalizing all applications which use them. perl v5.18.2 2014-01-06 English(3pm)
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