Retaining Pipeline values


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Retaining Pipeline values
# 1  
Old 08-16-2011
Retaining Pipeline values

Hi,

I am trying to calculate a few values using the below code but it dosent seem to be working.
Code:
for i in 1 2 3 4 5 6 7 8
do
j=`expr $i + 3`
x =`head -$j temp1|tail -1|cut -f24 -d","`
y =`head -$j temp1|tail -1|cut -f25 -d","`
c =`expr $x / $y`
echo "$c" >> cal_1
done

I am not getting any values in cal_1 file.
When I execute the script in verbose mode, I see below errors in each iteration:
Code:
x: not found
y: not found
c: not found

Can someone suggest a workaround ??

Last edited by Franklin52; 08-16-2011 at 08:49 AM.. Reason: Please use code tags for data and code samples, thank you
# 2  
Old 08-16-2011
Code:
 
j=`expr $i + 3`
x =`head -$j temp1|tail -1|cut -f24 -d","`
y =`head -$j temp1|tail -1|cut -f25 -d","`
c =`expr $x / $y`

There should not be any space between the = and x,y,c
This User Gave Thanks to itkamaraj For This Post:
# 3  
Old 08-16-2011
i think the problem is with spaces

try removing them
Code:
for i in 1 2 3 4 5 6 7 8
do
j=`expr $i + 3`;
x=`head -$j temp1|tail -1|cut -f24 -d","`;
y=`head -$j temp1|tail -1|cut -f25 -d","`;
c=`expr $x / $y`;
echo "$c" >> cal_1
done


Last edited by Franklin52; 08-16-2011 at 08:50 AM.. Reason: Please use code tags for data and code samples, thank you
This User Gave Thanks to shipra_31 For This Post:
# 4  
Old 08-16-2011
Thank a lot both of you.

Valus are populating now.Smilie
# 5  
Old 08-16-2011
Thanks a lot ! The issue is resolved
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Command pipeline trouble

Hello, I am attempting to ssh to a server and run a set of commands on a remote set of servers. I am getting the following error below, I am thinking quotes may be the problem. This command works on the local machine in bash. Not when I ssh to a remote server. Basically the command should... (3 Replies)
Discussion started by: jaysunn
3 Replies

2. Shell Programming and Scripting

If statement with pipeline

Hi Can anybody please explain me the following script in detail Value=`echo "if ( ${FACTOR} >= 1 ) {1}" | bc` What does "{1}" mean to here ? (3 Replies)
Discussion started by: Priya Amaresh
3 Replies

3. Shell Programming and Scripting

Change the delimiter from Comma to Pipeline

Hello All, I need to convert a csv file to pipeline delimiter file in UNIX. The data in file itself contains comma with double qouted qualifier apart from the comma separator. Let me know how to do it. Appreciate any help if awk can be used to do it. Mentioned below is the sample record of... (14 Replies)
Discussion started by: Arun Mishra
14 Replies

4. Shell Programming and Scripting

Perl: Problem in retaining values after each loop

use strict; use warnings; open (my $fhConditions, "<input1.txt"); #open input file1 open (my $fhConditions1, "<input2.txt");#open input file2 open (my $w1, ">output1"); open (my $w2, ">output2"); our $l = 10;#set a length to be searched for match our $site="AAGCTT";#pattern to be matched... (1 Reply)
Discussion started by: anurupa777
1 Replies

5. Shell Programming and Scripting

uniq -c in the pipeline

Hello gurus - I must be missing something, or there is a better way - pls enlighten me I'm on a Solaris 10 vm running the following pipeline to reduce some apache logs (actually lynx dumps of /server-status/ when threads are above a threshold) to a set of offending DDoS IP addresses. awk... (10 Replies)
Discussion started by: fletch00
10 Replies

6. Shell Programming and Scripting

Shell pipeline help for a n00b

I need to read input from a file, and make sure nothing prints after column 72. basically, ignore input after character 72 until the next newline character. Any help is appreciated. I have been searching forever! (10 Replies)
Discussion started by: Gbear
10 Replies

7. UNIX for Dummies Questions & Answers

retaining null values in ftp transfer

I am trying to ftp a file to a Unix server that contains null values. The file is on a Unisys system. It contains null values between data but when I look at the file on the Unix server, the nulls are gone and the data is compressed together. How do I not lose those null values? TIA, Betty (1 Reply)
Discussion started by: betty
1 Replies

8. Shell Programming and Scripting

Comments within a shell pipeline

I've got a very ugly pipeline for analyzing web server logs (but nevermind the application; I've come across this in other scripts as well). I want to nicely comment the steps in the pipeline, but I can't seem to do it. I know, for instance that in csh/sh/bash, a # begins a comment, and any... (2 Replies)
Discussion started by: otheus
2 Replies

9. UNIX for Dummies Questions & Answers

Unix Pipeline help

Does anyone know how to answer this? I have tried many different commands, I just cant get it right..... Search the file 'data' for all of the lines that contain the pattern 'unx122' and put those lines in the file 'matches'. (2 Replies)
Discussion started by: netmaster
2 Replies

10. Programming

C program help please! input from pipeline

I have a project where I have to use bzcat to uncompress a file and use that output as the data to run another program on. I understand that you would do (bzcat filename.bz2 ! program name) but then how do you access that data in the c program??? Please help thanks (2 Replies)
Discussion started by: kinggizmo
2 Replies
Login or Register to Ask a Question