11-16-2006
equation calculation on Unix
Hay, guys,
Any ideas how to calculate like this:
in first file, there're number of lines listing 2+3, 6*9 .......
Then, how to get the result and put them in another file in format:
2+3 5
6*9 54
......
sheerly by shell command, no scripts required.
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
Is there a way to evaluate an equation contained in a string within an AWK script?
For example:
A = "(5*2)-1" (this equation is read from a file and varies line by line)
In this example, I can't see any way to get an answer of 9 unless I do:
cmd = "awk 'BEGIN{print "A"}'"
cmd |... (3 Replies)
Discussion started by: srdgeo
3 Replies
2. Shell Programming and Scripting
Hi, I am in ksh88
I am trying to get the result of the calculation using 3 variables:
TOTAL
CAPACITY
and get the following error:
$DB_CAPACITY=(( $DB_SIZE * 100 / $TOTAL ))
ksh: syntax error: `((' unexpected
I cannot figure out what am I doing wrong... Thanks for any help -A (2 Replies)
Discussion started by: aoussenko
2 Replies
3. Shell Programming and Scripting
if input to the perl program is ' ( p * ((a+b) * (c+d))) + q ' it shuld give the output as ' pac + pad + pbc + pbd + q ' .can anyone suggest a way to do this ? (7 Replies)
Discussion started by: Anuj8584
7 Replies
4. High Performance Computing
I'm running a MPI program using a cluster of 4 machines(different machines of different processing power,cpu utilization etc.). I'm trying to balance the computation among the machine to get the minimum execution time for that. I tried to balance it by creating a threshold value by taking the load... (1 Reply)
Discussion started by: chamila1986
1 Replies
5. Shell Programming and Scripting
Hi, i have a large file like this:
Contig1 1 5
Contig1 2 4
Contig1 3 3
Contig1 4 5
Contig1 5 3
Contig1 6 4
Contig2 1 3
Contig2 2 7
Contig2 3 2
Contig2 4 9
Contig2 5 10
Contig2 6 3
Contig2 7 7
Contig2 8 2
Contig2 9 7
Contig2 10 5
contig1 2 4
contig1 3 3
contig1 4 5 (3 Replies)
Discussion started by: the_simpsons
3 Replies
6. Shell Programming and Scripting
HI All,
I have a script in bash that i want that script will perform action
When the size of a particular folder exceeds the 80%.
Here is an example of script that result is exactly 80% :
#!/bin/bash
CHECK=$(df -h /var/log/syslog | grep '80%' | xargs echo | cut -d' ' -f5)
if ];... (1 Reply)
Discussion started by: Aviel.shani
1 Replies
7. Homework & Coursework Questions
! The one-dimensional PDE for heat diffusion equation
! u_t=(D(u)u_x)_x + s where u(x,t) is the temperature,
! D(u) is the diffusivity and s(x,t) is a source term.
! Taking D(u)= 1 and s(x,t)=0 gives
! u_t= u_xx
! uniform one dimensional region |x|<1 for t>0
! uniform mesh size delta x=0.1
!... (1 Reply)
Discussion started by: watto1
1 Replies
8. UNIX for Dummies Questions & Answers
I want to automate change in 'from yyyy/mm/dd to yyyy/mm/dd' every month in a unix program.
For example in this month 'from yyyy/mm/dd to yyyy/mm/dd' is 'from 2014/10/01 to 2014/11/01' next month it should be 'from 2014/11/01 to 2014/12/01'
Can any one provide me the code for the above... (2 Replies)
Discussion started by: srinivas kasett
2 Replies
9. Programming
Well guys and gals I have discovered after all these years that Python does complex numbers without the 'complex()' function or 'cmath' import.
It is well known that Euler's Identity E**(i*pi)+1=0 so I decided to experiment
Last login: Fri Dec 13 18:27:30 on ttys000
AMIGA:amiga~> python3.8... (0 Replies)
Discussion started by: wisecracker
0 Replies
LEARN ABOUT HPUX
checkbashisms
CHECKBASHISMS(1) General Commands Manual CHECKBASHISMS(1)
NAME
checkbashisms - check for bashisms in /bin/sh scripts
SYNOPSIS
checkbashisms script ...
checkbashisms --help|--version
DESCRIPTION
checkbashisms, based on one of the checks from the lintian system, performs basic checks on /bin/sh shell scripts for the possible presence
of bashisms. It takes the names of the shell scripts on the command line, and outputs warnings if possible bashisms are detected.
Note that the definition of a bashism in this context roughly equates to "a shell feature that is not required to be supported by POSIX";
this means that some issues flagged may be permitted under optional sections of POSIX, such as XSI or User Portability.
In cases where POSIX and Debian Policy disagree, checkbashisms by default allows extensions permitted by Policy but may also provide
options for stricter checking.
OPTIONS
--help, -h
Show a summary of options.
--newline, -n
Check for "echo -n" usage (non POSIX but required by Debian Policy 10.4.)
--posix, -p
Check for issues which are non POSIX but required to be supported by Debian Policy 10.4 (implies -n).
--force, -f
Force each script to be checked, even if it would normally not be (for instance, it has a bash or non POSIX shell shebang or appears
to be a shell wrapper).
--extra, -x
Highlight lines which, whilst they do not contain bashisms, may be useful in determining whether a particular issue is a false posi-
tive which may be ignored. For example, the use of "$BASH_ENV" may be preceded by checking whether "$BASH" is set.
--version, -v
Show version and copyright information.
EXIT VALUES
The exit value will be 0 if no possible bashisms or other problems were detected. Otherwise it will be the sum of the following error val-
ues:
1 A possible bashism was detected.
2 A file was skipped for some reason, for example, because it was unreadable or not found. The warning message will give details.
SEE ALSO
lintian(1).
AUTHOR
checkbashisms was originally written as a shell script by Yann Dirson <dirson@debian.org> and rewritten in Perl with many more features by
Julian Gilbey <jdg@debian.org>.
DEBIAN
Debian Utilities CHECKBASHISMS(1)