awk comparison with variable


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting awk comparison with variable
# 1  
Old 09-07-2009
awk comparison with variable

hi,

I want to compare i variable in the awk statement but its not working out. Pl help me out

If we do the comparison like this its OK,

Code:
cat sample | awk -F" ", '{if ($1=="1-Sep-2009") print $1,$2,$3,$4,$5}'


But if u use a variable instead of "1-Sept-2009", it does not return anything,

Code:
d1=$(TZ=GMT-24 date +%cc | awk -F" ", '{print $1}')
d1=$(TZ=GMT-24 date +%cc | awk -F" ", '{print $2}')
cat sample | awk -F" ", '{if ($1==($d1"-"$d2"-2009") print $1,$2,$3,$4,$5}'


Pl suggest how can i incorporate this?

Thanks

Last edited by vgersh99; 09-07-2009 at 05:39 PM.. Reason: code tags, PLEASE!
# 2  
Old 09-07-2009
Hello,

Check this User guide:
The GNU Awk User's Guide

Translated for your problem:
Code:
awk -F" " -v d1="$d1" -v d2="$d2" '$1==d1"-"d2"-2009" {print $1,$2,$3,$4,$5}'

# 3  
Old 09-07-2009
To keep the forums high quality for all users, please take the time to format your posts correctly.

First of all, use Code Tags when you post any code or data samples so others can easily read your code. You can easily do this by highlighting your code and then clicking on the # in the editing menu. (You can also type code tags [code] and [/code] by hand.)

Second, avoid adding color or different fonts and font size to your posts. Selective use of color to highlight a single word or phrase can be useful at times, but using color, in general, makes the forums harder to read, especially bright colors like red.

Third, be careful when you cut-and-paste, edit any odd characters and make sure all links are working property.

Thank You.

The UNIX and Linux Forums
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk if comparison with variable

Hi , Need help, p for value in `awk -F, '{print $1 }' ad | uniq` do x=$(echo $value) echo $x echo `awk -F, '{if( $1 == $x) sum = sum + $8 } END{print sum}' ad` --- not working echo `awk -F, '{if($1 == “MT”) sum = sum + $8 } END{print sum}' ad` -- Working but hard coded done; ad... (4 Replies)
Discussion started by: nadeemrafikhan
4 Replies

2. Shell Programming and Scripting

Variable comparison in 'if' with a string.

Hi All, I want to compare the variable value with string in a shell script. my code is: for var in $packsName do if then echo $var fi done But I am getting error as: ABC : not found. Am I going wrong somwhere? please guide. Thanks. (5 Replies)
Discussion started by: AB10
5 Replies

3. Shell Programming and Scripting

awk comparison

Hello all, Probably a very simple question, I am stuck with a small part of a code: I am trying to do a comparison to get the maximum value of column 6 if columns 1, 4 and 5 of two or more rows match. Here is what I am doing: awk -F'\t' '{if ($6 > a)a=$6}END{for (i in a) print i"\t"a}' ... (4 Replies)
Discussion started by: jaysean
4 Replies

4. Shell Programming and Scripting

Comparison and editing of files using awk.(And also a possible bug in awk for loop?)

I have two files which I would like to compare and then manipulate in a way. File1: pictures.txt 1.1 1.3 dance.txt 1.2 1.4 treehouse.txt 1.3 1.5 File2: pictures.txt 1.5 ref2313 1.4 ref2345 1.3 ref5432 1.2 ref4244 dance.txt 1.6 ref2342 1.5 ref2352 1.4 ref0695 1.3 ref5738 1.2... (1 Reply)
Discussion started by: linuxkid
1 Replies

5. Shell Programming and Scripting

Strange variable comparison result in awk

So, I'm making a little awk script that generates a range-based histogram of a set of numbers. I've stumbled onto a strange thing. Toward the end of the process, I have this test: if ( bindex < s ) "bindex" is the "index" of my "bin" (the array element that gets incremented whenever a... (2 Replies)
Discussion started by: treesloth
2 Replies

6. Shell Programming and Scripting

Awk multiple variable array: comparison

Foo.txt 20 40 57 50 22 51 66 26 17 15 63 18 80 46 78 99 87 2 14 14 51 47 49 100 58 Bar.txt 20 22 51 15 63 78 99 55 51 58 How to get output using awk 20 22 57 50 51 15 26 17 63 78 80 46 99 55 - - 51 58 49 100 (5 Replies)
Discussion started by: genehunter
5 Replies

7. Shell Programming and Scripting

Comparison between variable and regexp

Hi all, How I could compare variable and regexp? For example... I am running the script ./aaa.sh -b * * is variable $2 (second argument of script). I would compare variables $a (generated from my cycle) and $2 as regexp. I need from regular expression find file that satisfies this regexp.... (1 Reply)
Discussion started by: Koblenc
1 Replies

8. Shell Programming and Scripting

Variable comparison

Can anyone help me with this section of code? The scenario is a value drops from A to B or A to C or B to C. If it drops from A to B or B to C, we print "Drop one level" If it drops from A to C, we print "Dropped two levels". The problem is script is throwing error when comparing variable... (2 Replies)
Discussion started by: sundar63
2 Replies

9. UNIX for Dummies Questions & Answers

multiple comparison in awk

I have an input file. Each line in it has several characters. If the first three characters of the line is '000' or '001' or '002' or '003', I need to print it in output. How can I do this in awk. I am able to do if the search string is only one (let us say 000). cat <filename> | awk... (1 Reply)
Discussion started by: paruthiveeran
1 Replies

10. Shell Programming and Scripting

variable comparison

Hello, I am trying to compare two variables, which both have a word stored in it. The code I am using is. Please tell me which one of these is correct.Or please tell me the correct syntax. Thankyou if then if then if then if then if then None of them seems to work... (3 Replies)
Discussion started by: Freakhan
3 Replies
Login or Register to Ask a Question