How to evaluate expression under awk? Post: 303002126

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Check for more than one expression using AWK

I have a txt file like below: testin.txt AB BC CD DE I have the following awk script BEGIN {flag1="N"} /(AB)|(BC)|(CD)|(DE)/ {flag1="Y"} END {print flag1} >awk -f testin.awk testin.txt Returns Y

2. Shell Programming and Scripting

Regular expression in AWK

Hello world, I was wondering if there is a nicer way to write the following code (in AWK): awk ' FNR==NR&&$1~/^m$/{tok1=1} FNR==NR&&$1~/^m10$/{tok1=1} ' my_file In fact, it looks for m2, m4, m6, m8 and m10 and then return a positive flag. The problem is how to define 10 thanks...

3. UNIX for Dummies Questions & Answers

Awk inside Awk expression

Hi, It can be used awk inside other Awk?. I need to get another text processing while other text process. Thank you.

4. Shell Programming and Scripting

How to evaluate a string of numbers in the same command of AWK

Hi, I am trying to do evaluate one numerical string after substitution. ++++++++++++++++== What I have = "7.04+2.3Xlog(0.72e-6X1.0e6)X1.9596" What I need = evaluate 7.04+2.3*log(0.72e-6*1.0e6)*1.9596 = 5.55941 what I am doing; echo "7.04+2.3Xlog(0.72e-6X1.0e6)X1.9596" | awk...

5. Shell Programming and Scripting

awk if statement to evaluate string and compare

I have the following simplified code that I am planning on putting into a larger shell script. I have been butchering it to try and make work amongst google searches and reading awk documentation. amixer sset Master toggle | awk '{ if ( /^ Front Left/ { print $7 } == // ) print "MUTED" }'I...

6. Shell Programming and Scripting

Help in understanding awk expression

Hi, Could somebody help me in understanding the following awk expression: awk -v n="POINT" '/%/{print $0 "\n" n ;next}1' < file name Thanks, Arun

7. Shell Programming and Scripting

awk regular expression

Hello, I have big files which I wanna filter them based on first column. first column should be one of these strings: chr2L || chr2R || chr3L || chr3R || chr4 || chrX and something like chr2Lh or chrY or chrM3L is not accepted. I used the following command: awk '{ if ($1=="chr2L" ||...

8. Shell Programming and Scripting

awk print expression

Hi All, I have a doubt in awk print exp. Where in some awk commands have seen a digit 1 appended at the end of the awk ,didnt remember the command . like .. cat file |awk '{print }1' Could some one help in understanding these cases where we use them. Regards, Ganesh,

9. Shell Programming and Scripting

How to evaluate a variable name on LHS of expression?

I am trying to write a simple function to select values from a database and assign them to variables. It can have any number of arguments sent into it, and I want to assign the value retrieved to a different variable name for each argument sent in. So my code looks something like this: ...

10. Shell Programming and Scripting

Evaluate Expression within awk

I want to create a conditional expression string and pass in an awk script. My script is as below... comm="\$3 == "hello"" awk -F "^T" -v command="${comm}" ' { if ( command ) { print "hye" } }' testBut the statement "if ( command )" always evaluates to true which is not...

LEARN ABOUT SUSE

time::ctime

Time::CTime(3)						User Contributed Perl Documentation					    Time::CTime(3)

NAME

       Time::CTime -- format times ala POSIX asctime

SYNOPSIS

	       use Time::CTime
	       print ctime(time);
	       print asctime(localtime(time));
	       print strftime(template, localtime(time));

   strftime conversions
	       %%      PERCENT
	       %a      day of the week abbr
	       %A      day of the week
	       %b      month abbr
	       %B      month
	       %c      ctime format: Sat Nov 19 21:05:57 1994
	       %d      DD
	       %D      MM/DD/YY
	       %e      numeric day of the month
	       %f      floating point seconds (milliseconds): .314
	       %F      floating point seconds (microseconds): .314159
	       %h      month abbr
	       %H      hour, 24 hour clock, leading 0's)
	       %I      hour, 12 hour clock, leading 0's)
	       %j      day of the year
	       %k      hour
	       %l      hour, 12 hour clock
	       %m      month number, starting with 1
	       %M      minute, leading 0's
	       %n      NEWLINE
	       %o      ornate day of month -- "1st", "2nd", "25th", etc.
	       %p      AM or PM
	       %r      time format: 09:05:57 PM
	       %R      time format: 21:05
	       %S      seconds, leading 0's
	       %t      TAB
	       %T      time format: 21:05:57
	       %U      week number, Sunday as first day of week
	       %w      day of the week, numerically, Sunday == 0
	       %W      week number, Monday as first day of week
	       %x      date format: 11/19/94
	       %X      time format: 21:05:57
	       %y      year (2 digits)
	       %Y      year (4 digits)
	       %Z      timezone in ascii. eg: PST

DESCRIPTION

       This module provides routines to format dates.  They correspond to the libc routines.  &strftime() supports a pretty good set of coversions
       -- more than most C libraries.

       strftime supports a pretty good set of conversions.

       The POSIX module has very similar functionality.  You should consider using it instead if you do not have allergic reactions to system
       libraries.

GENESIS

       Written by David Muir Sharnoff <muir@idiom.com>.

       The starting point for this package was a posting by Paul Foley <paul@ascent.com>

LICENSE

       Copyright (C) 1996-1999 David Muir Sharnoff.  License hereby granted for anyone to use, modify or redistribute this module at their own
       risk.  Please feed useful changes back to muir@idiom.com.

perl v5.12.1							    2004-02-08							    Time::CTime(3)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Check for more than one expression using AWK

Discussion started by: visakhcr

2. Shell Programming and Scripting

Regular expression in AWK

Discussion started by: jolecanard

3. UNIX for Dummies Questions & Answers

Awk inside Awk expression

Discussion started by: pepeli30

4. Shell Programming and Scripting

How to evaluate a string of numbers in the same command of AWK

Discussion started by: vivek_shm74