Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Assign value to external variables from awk
Top Forums Shell Programming and Scripting Assign value to external variables from awk Post 302531980 by Scott on Sunday 19th of June 2011 06:32:53 AM
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.

Code:
$ cat SomeScript
unset grade1 grade2 grade3

while IFS=, read name year g1 g2 g3; do
  grade1[${#grade1[@]}]="$g1"
  grade2[${#grade2[@]}]="$g2"
  grade3[${#grade3[@]}]="$g3"
done < inputfile

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

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

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

Code:
$ ./SomeScript
First Grade 1:
Grade1
Second Grade 2:
Grade2
All Grade 3's:
Grade3 Grade3 Grade3

 

10 More Discussions You Might Find Interesting

1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

LEARN ABOUT DEBIAN

bup-margin

bup-margin(1)						      General Commands Manual						     bup-margin(1)

NAME

       bup-margin - figure out your deduplication safety margin

SYNOPSIS

       bup margin [options...]

DESCRIPTION

       bup margin  iterates  through  all  objects  in	your  bup repository, calculating the largest number of prefix bits shared between any two
       entries.  This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.

       For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45.  That  means  a  46-bit
       hash  would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
       its first 46 bits.

       The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects.  Since SHA-1 hashes have 160 bits,
       that  leaves 115 bits of margin.  Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
       with far fewer objects.

       If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see	if
       you're getting dangerously close to 160 bits.

OPTIONS

       --predict
	      Guess  the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
	      from the guess.  This is potentially useful for tuning an interpolation search algorithm.

       --ignore-midx
	      don't use .midx files, use only .idx files.  This is only really useful when used with --predict.

EXAMPLE

	      $ bup margin
	      Reading indexes: 100.00% (1612581/1612581), done.
	      40
	      40 matching prefix bits
	      1.94 bits per doubling
	      120 bits (61.86 doublings) remaining
	      4.19338e+18 times larger is possible

	      Everyone on earth could have 625878182 data sets
	      like yours, all in one repository, and we would
	      expect 1 object collision.

	      $ bup margin --predict
	      PackIdxList: using 1 index.
	      Reading indexes: 100.00% (1612581/1612581), done.
	      915 of 1612581 (0.057%)

SEE ALSO

       bup-midx(1), bup-save(1)

BUP

       Part of the bup(1) suite.

AUTHORS

       Avery Pennarun <apenwarr@gmail.com>.

Bup unknown-															     bup-margin(1)
All times are GMT -4. The time now is 11:59 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy