Assigning array values using awk in shell scripting

Shell Programming and Scripting
1

hi
My script as below

#!/bin/ksh
for i in `seq 1 7`
do
a[$i]=$(awk '{print $i}' /home/rama/expenese.txt)
done
for i in `seq 1 7`
do
echo "${a}"
done

content of expense.txt is as below

5032     210179         3110     132813874   53488966   11459221    5300794

I want output as below

5032
210179
3110
132813874
53488966
11459221
5300794

but after executing above script, output as below

5032     210179         3110     132813874   53488966   11459221    5300794 
5032     210179         3110     132813874   53488966   11459221    5300794 
5032     210179         3110     132813874   53488966   11459221    5300794 
5032     210179         3110     132813874   53488966   11459221    5300794 
5032     210179         3110     132813874   53488966   11459221    5300794 
5032     210179         3110     132813874   53488966   11459221    5300794 
5032     210179         3110     132813874   53488966   11459221    5300794

can anyone help me to get desired output, Thanks in advance.

2

There's almost never a reason to dump a file into an array in shell, let alone a silly method that runs awk on the same line 7 times. I've seen people who think they have to run awk n times for n lines before, but n*7 times for n lines is a new one on me! :slight_smile:

This accomplishes the output you wanted without awk or arrays in one line:

$ tr -s ' \t' '\n' < /home/rama/expenese.txt

5032
210179
3110
132813874
53488966
11459221
5300794

$

If you really do want it stored in your shell, you could do this:

# works in any bourne shell
set -- `cat file`

echo $1
echo $2

or

# requires ksh
set -A arrname `cat file`

But again, there's almost never any reason to dump a file into an array in shell. Please explain your actual goal.

3

echo it without double quotes

echo ${a}
4

Also try line:

a[$i]=$(awk '{for (i=1; i<=NF; i++) print $(i)}' /home/rama/expenese.txt)
5

my actual goal is i want to recall array values again some whereelse in script

6 
$ cat e.txt
5032     210179         3110     132813874   53488966   11459221    5300794
$ arr=(`cat e.txt`)
$ echo ${arr[0]}
5032
$ echo ${arr[1]}
210179
$ echo ${arr[2]}
3110
$ echo ${arr[4]}
53488966
$ echo ${arr[3]}
132813874
$ echo ${arr[5]}
11459221
$ echo ${arr[6]}
5300794
7

That's not your goal, that's the way you've chosen to solve the problem.

What do you want to recall these values for? Why an array and not some other kind of variable? To recall them in order? That's what a shell for loop is for.