Top Forums Shell Programming and Scripting Need help in assigning output of n commands to n variables automatically inside a for loop Post 302515634 by Corona688 on Wednesday 20th of April 2011 02:48:38 PM
If it's just numbers like 1|2|3|4, then

Code:
#!/bin/ksh

IFS="|"
# Read individual lines from inputfile
while read LINE
do
        # Split $LINE apart on IFS into the array CSI
        set -A CSI $LINE

        # Start at column 1.  Column 0 would be that time column
        N=1
        while [ ! -z "${CSI[$N]}" ]
        do
                # If the column is blank, set it to zero
                [ -z "${CS[$N]}" ] && ((CS[$N]=0))
                # Add the number to the column
                ((CS[$N] += CSI[$N]))
                # Add one to N
                ((N++))
        done
done < inputfile

N=1
while [ ! -z "${CS[$N]}" ]
do
        echo "cs$N=${CS[$N]}"
        ((N++))
done

Code:
$ cat >inputfile <<EOF
1|2|3|4
5|6|7|8
9|10|11|12
EOF
$ ./addcol.sh
cs1=18
cs2=21
cs3=24
$

---------- Post updated at 12:45 PM ---------- Previous update was at 12:41 PM ----------

Updated to fit your data better:

Code:
#!/bin/ksh

IFS="|"
# Read individual lines from inputfile
while read TIME LINE
do
        # Split $LINE apart on IFS into the array CSI
        set -A CSI $LINE

        N=0
        while [ ! -z "${CSI[$N]}" ]
        do
                [ -z "${CS[$N]}" ] && ((CS[$N]=0))
                ((CS[$N] += CSI[$N]))
                ((N++))
        done
done < inputfile

N=0
while [ ! -z "${CS[$N]}" ]
do
        echo "cs$N=${CS[$N]}"
        ((N++))
done

---------- Post updated at 12:48 PM ---------- Previous update was at 12:45 PM ----------

...or just do it all in awk then read it once into the shell:

Code:
LINE="`awk -v FS='|' '{ for(N=2; N<=NF; N++) { T[N]+=$N; MAX=N; } }
END { for(N=2; N<=MAX; N++) printf("%s ", T[N]); printf("\n"); }' inputfile`"

set -A CS $LINE

N=0
while [ ! -z "${CS[$N]}" ]
do
        echo "CS$N=${CS[$N]}"
        ((N++))
done

 
Test Your Knowledge in Computers #839
Difficulty: Medium
WebSocket is a computer communications protocol, providing half-duplex communication channels over a single TCP connection.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

assigning variables

Before I even attempt this, is it possible to grep for a pattern, maybe a partial sentence like "go to page 3", assign that to a variable and then use awk or something to pull out the 3 and assign it to a variable? So first I would have Gotopg = "go to page 3" then page = 3 (9 Replies)
Discussion started by: k@ssidy
9 Replies

2. Shell Programming and Scripting

Assigning nawk output to variables

I do a lot of command line scripting to capture data from files or other command output. I've checked in a number of Unix and scripting books but for the life of me I can't find out how to asign field data from nawk output into variables that I can manipulate later. For example, reading a two... (6 Replies)
Discussion started by: steveje0711
6 Replies

3. UNIX for Dummies Questions & Answers

assigning variables from standard output

What am I doing wrong? I was searching for the answer to assigning variables from output. I found this simple response ls -l apply_want.m | read perms links owner group size mtime1 mtime2 mtime3 file this should allow me to echo the variables echo "$perms | $links | $owner | $group |... (2 Replies)
Discussion started by: whamchaxed
2 Replies

4. Shell Programming and Scripting

Assigning inside for loop

If I have 3 variables and I want to check if any of these is null. If one of them is null then it should be assigned a value of 0.I have the following code below. The output should be 0 is A, 11 is B, 33 is C $a= $b=11 $c=33 $echo $a $b $c $11 33 for i in "${a}" "${b}" "${c}"; do ... (2 Replies)
Discussion started by: thana
2 Replies

5. Shell Programming and Scripting

Using variables created sequentially in a loop while still inside of the loop [bash]

I'm trying to understand if it's possible to create a set of variables that are numbered based on another variable (using eval) in a loop, and then call on it before the loop ends. As an example I've written a script called question (The fist command is to show what is the contents of the... (2 Replies)
Discussion started by: DeCoTwc
2 Replies

6. Solaris

Assigning Temp IP inside zones

I want to assign ip to a zone , but i dont want that ip to be retained when the zone is rebooted , is there a way to do it ? Thx (7 Replies)
Discussion started by: skamal4u
7 Replies

7. Shell Programming and Scripting

How to give a variable output name in a shell script inside a for loop

Hi all I run my program prog.c in the following way : $ ./prog 1 > output.txt where 1 is a user defined initial value used by the program. But now I want to run it for many a thousand initial values, 1-1000, and store all the outputs in different files. Like $ ./prog 1... (1 Reply)
Discussion started by: alice06
1 Replies

8. Shell Programming and Scripting

problem in assigning substr to a variable inside awk

Hi All, I have a fixed-width datafile from which i need to extract value/string starting from some position to the specified length in each of the lines. awk '{print substr($0,x,y)}' datafile --- is working fine but awk 'BEGIN{a=0}{a=substr($0,x,y);print $a}' datafile ---is giving... (3 Replies)
Discussion started by: loggedin.ksh
3 Replies

9. Shell Programming and Scripting

Getting phone number, its message and assigning them into 2 variables then screen output.

Hi Everyone, I have a flatfile "inbox.txt" which contains some information: Location 0, folder "Inbox", SIM memory, Inbox folder SMS message SMSC number : "+24800000023" Sent : Sat 04 Aug 2012 09:01:00 PM +0700 Coding : Default GSM alphabet... (5 Replies)
Discussion started by: testcase
5 Replies

10. Shell Programming and Scripting

Assigning values to 2 variables within for loop

Hi All, Is it possible to grep for two files and assign their names to two separate variables with for loop? I am doing the below currently: if then for fname in $( cd $dirA ; ls -tr | grep "^Ucountry_file$") do InFile=$dirA/$fname ... (4 Replies)
Discussion started by: swasid
4 Replies
WCWIDTH(3)						   BSD Library Functions Manual 						WCWIDTH(3)

NAME
wcwidth -- number of column positions of a wide-character code LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <wchar.h> int wcwidth(wchar_t wc); DESCRIPTION
The wcwidth() function determines the number of column positions required to display the wide character wc. RETURN VALUES
The wcwidth() function returns 0 if the wc argument is a null wide character (L''), -1 if wc is not printable, otherwise it returns the number of column positions the character occupies. EXAMPLES
This code fragment reads text from standard input and breaks lines that are more than 20 column positions wide, similar to the fold(1) util- ity: wint_t ch; int column, w; column = 0; while ((ch = getwchar()) != WEOF) { w = wcwidth(ch); if (w > 0 && column + w >= 20) { putwchar(L' '); column = 0; } putwchar(ch); if (ch == L' ') column = 0; else if (w > 0) column += w; } SEE ALSO
iswprint(3), wcswidth(3) STANDARDS
The wcwidth() function conforms to IEEE Std 1003.1-2001 (``POSIX.1''). BSD
August 17, 2004 BSD

Featured Tech Videos

All times are GMT -4. The time now is 04:14 PM.
Unix & Linux Forums Content Copyright 1993-2020. All Rights Reserved.
Privacy Policy