Assign value to external variables from awk

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Assign value to external variables from awk
# 1  
Old 06-19-2011
Assign value to external variables from awk

I have a text file with the next pattern

I want to assign to external variables the grades using the awk method.
After i read the file line by line in order to get the grades i use this
grade1=echo $line | awk -F, '{ print $3 }'
grade2=echo $line | awk -F, '{ print $4 }'
grade3=echo $line | awk -F, '{ print $5 }'

Is there a way to assign values returned by awk to external variables from inside the awk command?
I know the next code wont work but something like this
echo $line | awk -F, '{ grade1= $3; grade2= $4; grade3= $5; }'

# 2  
Old 06-19-2011
Is there a way to assign values returned by awk to external variables from inside the awk command?
No. But maybe you need something like this:
% cat testfile                                                         
app@m11 ~/tmp
% cat testfile | tr ',' ' ' | while read name year grade1 grade2 grade3
  echo $grade1
  echo $grade2
  echo $grade3

# 3  
Old 06-19-2011
Of course, as your input contains three grades per line, you might want to store all of them in one go.

$ cat SomeScript
unset grade1 grade2 grade3

while IFS=, read name year g1 g2 g3; do
done < inputfile

echo "First Grade 1:"
echo ${grade1[0]}

echo "Second Grade 2:"
echo ${grade2[1]}

echo "All Grade 3's:"
echo ${grade3[@]}

$ ./SomeScript
First Grade 1:
Second Grade 2:
All Grade 3's:
Grade3 Grade3 Grade3

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk to assign points to variables based on conditions and update specific field

I have been reading old posts and trying to come up with a solution for the below: Use a tab-delimited input file to assign point to variables that are used to update a specific field, Rank. I really couldn't find too much in the way of assigning points to variable, but made an attempt at an awk... (4 Replies)
Discussion started by: cmccabe
4 Replies

2. Shell Programming and Scripting

awk - Why can't value of awk variables be passed to external functions ?

I wrote a very simple script to understand how to call user-defined functions from within awk after reading this post. function my_func_local { echo "In func $1" } export -f my_func_local echo $1 | awk -F"/" '{for (k=1;k<=NF;k++) { if ($k == "a" ) { system("my_local_func $k") } else{... (19 Replies)
Discussion started by: sreyan32
19 Replies

3. Shell Programming and Scripting

How can we assign value to an array variable from an external file?

is it possible to assign value to an array variable from an external file?? if yes then how?? I am using below code but its not working. #!bin/bash myarray < file_name echo ${mayarray} (6 Replies)
Discussion started by: mukulverma2408
6 Replies

4. Shell Programming and Scripting

match and assign variables

Hi guys, I'm currently writing a script for automating a FreeBSD ZFS setup (ZFSonRooT). I got stuck at one point for raidz(1,2 a.k.a raid5,6) and am in need of assistance. This is what I need. example: #!/bin/sh <- must stay sh echo -n "hdd list: " read hdd_list echo -n "hdd label list:... (2 Replies)
Discussion started by: da1
2 Replies

5. Shell Programming and Scripting

how to assign a value to several variables inside awk call

Hi I am using 'awk" to get file size and date of the file: op - sundev3 $ ls -l /bb/bin/tsfiles.sel | awk '{print $5 $6 $7}' 1587May8 May be somobody knows the way to combine this command with variable assignmet inside the awk, so I would have variables SIZE, MONTH and DATE assigned after... (1 Reply)
Discussion started by: aoussenko
1 Replies

6. Shell Programming and Scripting

assign a command line argument and a unix command to awk variables

Hi , I have a piece of code ...wherein I need to assign the following ... 1) A command line argument to a variable e.g origCount=ARGV 2) A unix command to a variable e.g result=`wc -l testFile.txt` in my awk shell script When I do this : print "origCount" origCount --> I get the... (0 Replies)
Discussion started by: sweta_doshi
0 Replies

7. Shell Programming and Scripting

Substituting variables from external files

Hi All, I have the following problem: 1. I have a file containing a line: a,b,d,${d},e,f 2. From within a script I grep the file for '^a,' to get the line 3. I obtain the fourth field as follows: Field4="$( print -r $fileEntry | cut -d, -f4 )" 4. The script exports variables at the... (1 Reply)
Discussion started by: oneillc9
1 Replies

8. Shell Programming and Scripting

Awk/shell question: Read from file and assign to variables.

Is anyone able to help with writing a program that will do the following: 1. Read the contents of a file, line by line, and on each line, assign each of the two columns to a shell variable. 2. perform an action on the variables 3. Read the next line. Here is what I've gotten so far. ... (3 Replies)
Discussion started by: akbar
3 Replies

9. Shell Programming and Scripting

awk - arithemetic functions with external variables

I'm trying to get awk to do arithmetic functions with external variables and I'm getting an error that I cannot figure out how to fix. Insight would be appreciated money=$1 rate1=$(awk -F"\t " '/'$converting'/{print $3}' convert.table) rate2=$(awk -F"\t"... (2 Replies)
Discussion started by: DKNUCKLES
2 Replies

10. Shell Programming and Scripting

Assign variables with cut

I need to read a file (a list) and assign the value to a variable (for each line), I'm looping until the end of the file. My problem is, I want to assign 2 separate variables from the list. The process I'm using is: awk '{print $3}' file1 > file2 awk '{print $4}' file1 > file3 cat file2... (2 Replies)
Discussion started by: douknownam
2 Replies
Login or Register to Ask a Question

Featured Tech Videos