Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

awk: change string variable

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting awk: change string variable
# 1  
Old 11-26-2010
awk: change string variable
Hi.
How to change string variable in awk?
for example, I parse with awk script text file named some_name_with_extension.txt

I want to print only some_name in my script

Code:
....
varCompName = FILENAME
print varCompName

How to put not all symbols from FILENAME to variable?
thank you
This make my day

In windows I used some of next
Code:
%my_var:~0,-2%

would extract all but the last 2 characters of the my_var variable.
# 2  
Old 11-26-2010
Code:
awk '{ print substr(FILENAME,1, index(FILENAME, ".")-1) 
          ..........rest  of code here  }'  inputfile

# 3  
Old 11-26-2010
Not with awk but maybe it can help you Smilie
Code:
# var=qwerty
# echo ${var:0:${#var}-2} 
qwer

# 4  
Old 11-26-2010
Code:
$ var=gnorky
$ echo ${var%??}
$ gnor

# 5  
Old 11-30-2010
There's some problem wit using FILENAME variable
In gawk FILENAME return me full path to file.

is there any way to trancate extra info?
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Search for string in column using variable: awk

I'm interested to match column pattern through awk using an external variable for data: -9 1:751343:T:A -9 0 T A 0.726 -5.408837e-03 9.576603e-03 7.967536e-01 5.722312e-01 -9 1:751756:T:C -9 0 T C 0.727 -5.360458e-03 9.579447e-03 7.966977e-01 5.757858e-01... (7 Replies)
Discussion started by: genome
7 Replies

2. Shell Programming and Scripting

Make change to variable value inside of awk script

Hello, I have text data that looks like this, Mrv16a3102061815532D 6 6 0 0 0 0 999 V2000 -0.4018 1.9634 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.1163 1.5509 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.1163 0.7259 ... (9 Replies)
Discussion started by: LMHmedchem
9 Replies

3. Shell Programming and Scripting

awk to change specific string to new value if found in text file

I am trying to use awk to change a specific string in a field, if it is found, to another value. In the tab-delimited file the text in bold in $3 contains the string 23, which is always right before a ., if it is present. I am trying to change that string to X, keeping the formatting and the... (3 Replies)
Discussion started by: cmccabe
3 Replies

4. Shell Programming and Scripting

Concat String with variable after a 'grep' and awk

Here is the structure of my file: MyFile.txt g-4.n.g.fr 10.147.243.63 g-4.n.g.fr-w1 Here is my sript: test.sh #! /bin/sh ip=10.147.243.63 worker=$(grep -e $ip $1 | awk '{ print $3; }') echo "" echo $worker echo "" echo $worker echo "" echo "$worker.v.1" echo... (7 Replies)
Discussion started by: chercheur111
7 Replies

5. UNIX for Dummies Questions & Answers

awk - change variable on fly

Hello All, I have csv file, where one of fields is date (yyyy/mm/dd 00:00:00). Using awk I am trying to find all records with date newer/older than specific date. My idea was to compare unix timestamps of both dates: start=`date +%s -d "$DateStart"` awk -v start="$start" -v current=`date +%s... (34 Replies)
Discussion started by: haczyk
34 Replies

6. Shell Programming and Scripting

using awk for setting variable but change the output of this variable within awk

Hi all, Hope someone can help me out here. I have this BASH script (see below) My problem lies with the variable path. The output of the command find will give me several fields. The 9th field is the path. I want to captured that and the I want to filter this to a specific level. The... (6 Replies)
Discussion started by: Cowardly
6 Replies

7. Shell Programming and Scripting

How to change last character in string with a variable value.

Hey Guys, I have text such as this. 28003,ALCORN,2 28009,BENTON,2 28013,CALHOUN,2 28017,CHICKASAW,2 47017,CARROLL,2 05021,CLAY,0 The last digit after the final "," is a variable value. This is the base file. I have to do further execution on this file later and I need to update the... (7 Replies)
Discussion started by: chagan02
7 Replies

8. Shell Programming and Scripting

How to change awk and shell variable value?

In awk script, #!/bin/sh awk 'BEGIN{i=0;}{i=i+5;}END{print i}' in.txt vr=0; vr=$i; echo "$vr" How can i assign that value of i in $vr(variable) of shell script? (7 Replies)
Discussion started by: cola
7 Replies

9. Shell Programming and Scripting

Change existing variable value only user enters non-empty string.

I haven't checked any installation script to see how this is done.. But I could not even do following simple task. How do I Change existing variable value only when user enteres non-empty string. ? #!/usr/bin/ksh uid="scott" # Assign new value user enters to uid, else leave it... (7 Replies)
Discussion started by: kchinnam
7 Replies

10. Shell Programming and Scripting

change awk string result to number

How could I change the lines with grep and awk to output a number instead of a string? case '2': @ L0 = 1 @ LN = `grep RS_D resample.in | awk '{print $3}'` @ P0 = 1 @ PN = `grep RS_D resample.in | awk '{print $5}'` # ||| fall through ||| Cheers (1 Reply)
Discussion started by: larne
1 Replies
Login or Register to Ask a Question