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Top Forums Shell Programming and Scripting Reading colums from a text file Post 302895435 by adamw on Monday 31st of March 2014 08:51:44 PM
Old 03-31-2014
Reading colums from a text file

Hi all,

I have a text file that has (4) columns. There are about 300 lines on this file. It is a plain text file. I am looking to write a simple script that will read each line from the file and generate another text file. The file looks something like this:

These are the columns:

StudentName Grade Class Teacher
StudentName2 Grade Class Teacher
...
...
...
StudentName300 Grade Class Teacher

What I need to do is extract the text from this file and re-arrange it into another file.

For example, this is how the new file would be arranged:

Teacher Class Grade StudentName

I can easily do it when a file has just a single line, like this:
-------------------
StudentName = `cat /fileName | awk '{print $1}'
Grade = `cat /fileName | awk '{print $2}'
Class = `cat /fileName | awk '{print $3}'
Teacher = `cat /fileName | awk '{print $4}'

echo "${Teacher} ${Class} ${Grade} ${StudentName}" >> /NewFile
-------------------

Where I am struggling is how would I do this for a file that has 300 lines instead of just one?

I am sure it is something simple, I just need to be pointed in the right direction.

Thanks in advance!
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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