Sponsored Content
Full Discussion: [awk] Math & Bold-Font?
Top Forums Shell Programming and Scripting [awk] Math & Bold-Font? Post 302935041 by Corona688 on Thursday 12th of February 2015 12:29:52 PM
Old 02-12-2015
awk is not shell. It does not have shell variables or shell substitutions. If you want shell variables in awk, you have to put them there. If you want substitutions, you'll have to use awk's.

$ means column in awk. That's why $1 gets you column one. Variables are just strings, like VAR=1. You can use an expression as a column number too, like print $(VAR+1) for column 2.

So, to get your variables, into awk, you will have to put them into awk.

Code:
awk -v VAR1="value1" -v VAR2="value2" ... '{ code }' filenames

Or the more old-fashioned

Code:
awk '{code}' VAR1="value1" VAR2="value2" filename

To get pixels, in awk code, I'd do this:

Code:
split($2, A, "x");
pixels=A[0] * A[1];

Also, doing grep | grep | grep | awk is pointless when it's that easy to just put it all in awk. You can replace this:

Code:
grep -v "^#" filename | awk '{ ... }'

with:

Code:
awk '/^#/ { next } { ... }' filename

This User Gave Thanks to Corona688 For This Post:
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

awk logic and math help

Hi, My file has 2 fields and millions of lines. variableStep chrom=Uextra span=25 201 0.5952 226 0.330693 251 0.121004 276 0.0736858 301 0.0646982 326 0.0736858 401 0.2952 426 0.230693 451 0.221004 476 0.2736858 Each field either has a... (6 Replies)
Discussion started by: wyarosh
6 Replies

2. UNIX for Dummies Questions & Answers

colored/highlighted/bold matching pattern with awk ???

Hi ! Just wondering, is it possible to color or highlight or underline a matching pattern with awk ? Or write it in bold, italic.....? (3 Replies)
Discussion started by: lucasvs
3 Replies

3. Shell Programming and Scripting

Need help with AWK math

I am trying to do some math, so that I can compare the average of six numbers to a variable. Here is what it looks like (note that when I divide really big numbers, it isn't a real number): $ tail -n 6 named.stats | awk -F\, '{print$1}' 1141804 1140566 1139429 1134210 1084682 895045... (3 Replies)
Discussion started by: brianjb
3 Replies

4. Shell Programming and Scripting

output text in bold font using SED

hi I want to write a script, while using the SED editor, to output the text, in this case a variable, to the result file but highlighted it in bold, is it possible to do that? can you tell me how? eg. in text.txt sed '$ a\ '$variable' ' <text.txt >text2.txt so it will add the... (2 Replies)
Discussion started by: piynik
2 Replies

5. Shell Programming and Scripting

awk math and csv output

Hi I have this list 592;1;Z:\WB\DOCS;/FS3_100G/FILER112/BU/MPS/DOCS;;;;\\FILER112\BUMPS-DOCS\;580,116,544,878 Bytes;656,561 ;77,560 592;2;Z:\WB\FOCUS;/FS3_100G/FILER112/BU/MPS/FOCUS;;;;\\FILER112\BUMPS-FOCUS\;172,430 Bytes;6 ;0 ... (12 Replies)
Discussion started by: nakaedu
12 Replies

6. Shell Programming and Scripting

awk in horizontal and vertical math

Based on input ail,UTT,id1_0,COMBO,21,24,21,19,85 al,UTHAST,id1_0,COMBO,342,390,361,361,1454 and awk code as awk -F, '{ K=0; for(i=NF; i>=(NF-4); i--) { K=K+$i; J=J+$i;} { print K } } END { for ( l in J ) printf("%s ",J); }' I'm trying to add columns and lines in single line. line... (6 Replies)
Discussion started by: busyboy
6 Replies

7. Shell Programming and Scripting

awk --> math-operation in a array

Hi main object is categorize the difference of data-values (TLUFT02B - TLUFT12B). herefor i read out data-files which are named acording to the timeformat yyyymmddhhmm. WR030B 266.48 Grad 0 WR050B 271.46 Grad 0 WR120B 268.11 Grad 0 WV030B 2.51 m/s ... (6 Replies)
Discussion started by: IMPe
6 Replies

8. Shell Programming and Scripting

Count math using awk

Hi expert, I have log : TOTAL-TIME : 2125264636 DATA-BYTES-DOWN : 3766111307032 DATA-BYTES-UP : 455032157567 DL = (3766111307032/2125264636)/1024 = 1.73 UL = (455032157567/2125264636)/1024 = 0.21 I want the result : TOTAL = 1.94 ... (4 Replies)
Discussion started by: justbow
4 Replies

9. Shell Programming and Scripting

Math count %memory using awk

Hi expert, i have log this: Memory: 74410384 Memory: 75831176 Memory: 77961232 Memory: 77074656 Memory: 76086160 Memory: 77128592 Memory: 78045384 Memory: 76696040 Memory: 72401176 Memory: 72520016 Memory: 72137016 Memory: 73175832 Memory: 73034528 Memory: 71770736 Memory:... (4 Replies)
Discussion started by: justbow
4 Replies

10. What is on Your Mind?

Slowly Removing Bold Font Style - Step-by-Step

FYI, I'm slowly removing a lot of the bold font-styles from titles of discussions, forum titles, etc I'm not removing bold for the entire site because we do need bold from time to time, especially in posts and sometimes in other places. However, the original forum style had way too much... (3 Replies)
Discussion started by: Neo
3 Replies
English(3pm)						 Perl Programmers Reference Guide					      English(3pm)

NAME
English - use nice English (or awk) names for ugly punctuation variables SYNOPSIS
use English; use English qw( -no_match_vars ) ; # Avoids regex performance penalty # in perl 5.16 and earlier ... if ($ERRNO =~ /denied/) { ... } DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get triggered just by accessing them (like $0) will still be affected. For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module. See perlvar for a complete list of these. PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if your code is to run on perl 5.18 or earlier. This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing use English qw( -no_match_vars ) ; . It is especially important to do this in modules to avoid penalizing all applications which use them. perl v5.18.2 2014-01-06 English(3pm)
All times are GMT -4. The time now is 04:11 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy