Creating executable script--please help

Shell Programming and Scripting
1

Hi group,
I am very beginner in shell scripting and self learning.
I am trying to create and executable script to run awk from user defined variables.

e.g. suppose from a given file I want to delete some rows or some columns
We need to repeat this process for many files. Thus I was trying to write a script. Any help will be really great.
This is my progress so far:

# A script to modify delete particular row and column from tab delim files
osch=0
echo "1. Delete row from file"
echo "2. Delete columns from file"
echo "Select your choice [1 or 2]?"
read osch
if [$osch -eq 1]; 
then
        echo "Enter row numbers with space"
        read x
        echo 'You entered this line: ' $x
        set -A rarray $x
        do 
                awk 'NR!={rarray[@]}' INPUT > INPUT_modified
        done
        echo "Modified file is created"
fi

if [$osch -eq 2]; 
then
        echo "Enter column numbers with space"
	read y
        echo 'You entered this line: ' $y
	set -A rarray $y
        for i in
        do 
	     awk '{for(i=1;i<=NF;i++)if(i!={rarray[@]})printf '%s', $i OFS;print""}' INPUT > INPUT_modified
        done
        echo "Modified file is created"
fi

As a beginner this is just a try. PLEASE HELP
Thanks a lot in advance :slight_smile:

---------- Post updated at 12:58 PM ---------- Previous update was at 10:09 AM ----------

Any body in the group...please help. I am really stuck in here :confused:.

2

What is not working or what is missing? (give the output if you have errors...)

3

this is the output so far...

1. Delete row from file
2. Delete columns from file
Select your choice [1 or 2]?
1
./test-array: line 14: syntax error near unexpected token `do'
./test-array: line 14: `        do '
smitra:Desktop smitra$

And further I am having a problem to name the modified file as (Input)_modified.
Any help will be really great.
Thanks

4

as of now i found below issues, please check..

if [ $osch -eq 1 ]; #Space is needed in square brackets for first and second if.

#in first if there is no for loop ahead of do

for i in # i think you are checking for the areray elements .. add to the in..

5

Hi Pamu,
Thank for the reply. I tried to put space in the square bracket. But still the same problem And I am not sure how to fix the loop. :confused:

osch=0
echo "1. Delete row from file"
echo "2. Delete columns from file"
echo "Select your choice [1 or 2]?"
read osch
if [ $osch -eq 1 ]; 
then
        echo "Enter row numbers with space"
        read x
        echo 'You entered this line: ' $x
        set -A rarray $x
        do 
                awk 'NR!={rarray[@]}' INPUT > INPUT_modified
        done
        echo "Modified file is created"
fi

if [ $osch -eq 2 ]; 
then
        echo "Enter column numbers with space"
	read y
        echo 'You entered this line: ' $y
	set -A rarray $y
        do 
	     awk '{for(i=1;i<=NF;i++)if(i!={rarray[@]})printf '%s', $i OFS;print""}' INPUT > INPUT_modified
        done
        echo "Modified file is created"
fi

Here are the same error again:

1. Delete row from file
2. Delete columns from file
Select your choice [1 or 2]?
1
./test-array: line 14: syntax error near unexpected token `do'
./test-array: line 14: `        do '