Sponsored Content
Top Forums Shell Programming and Scripting Mathematical functions in bash shell Post 302344913 by cola on Tuesday 18th of August 2009 03:29:56 AM
Old 08-18-2009
Mathematical functions in bash shell

Hi,
How can i do the mathematical calculations in bash shell?
Are the mathematical functions available in bash shell?
Ex:
Code:
pow
ceil
floor
sqrt

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

shell script receiving variable and doing mathematical function

Hello, Please help for the following scenario: 1. Shell Scipt should receive 2 variables values (say a and b). 2. Within shell script, there should be division of those numbers (a/b). 3. The result should be whole number i.e. in case the result comes out to be 9.4, it should be returned as... (3 Replies)
Discussion started by: damansingh
3 Replies

2. Shell Programming and Scripting

bash functions arguments

This script is called fuu; #!/bin/bash speak() { case $1 in 1)echo one ;; 2)echo two ;; 3)echo three ;; esac } speak exit 0 when i run fuu 2 i expect "two" like... (2 Replies)
Discussion started by: Tártaro
2 Replies

3. Shell Programming and Scripting

Functions, exit, and kill in bash

Hello Okay, for reasons related to sourcing a script from another script, I've had to put my main loop into a function, and from there I call other functions. My problem then is exiting from deep within the function call stack. I used to simply call exit, and that would accomplish what I... (1 Reply)
Discussion started by: brsett
1 Replies

4. Shell Programming and Scripting

Can BASH handle mathematical operations and do a Search & Replace?

Hello, I have a bunch of xml file that needs to have edits made and I was wondering if a BASH script could handle it. I would like the script to look within my xml files and replace all integers greater than 5px with a value that is 25% smaller. For example, 100px = 75px. Since the integers... (12 Replies)
Discussion started by: jl487
12 Replies

5. Shell Programming and Scripting

functions and variables in bash

I have a bash script with some functions as below and am wondering if I can use the variables declared in setup in the other functions and in the rest of the bash script. setup(){ none=0; low=1; medium=2; high=3; debug=4 var1="red" var2="fred" } create_basemap() { ... (7 Replies)
Discussion started by: kristinu
7 Replies

6. Homework & Coursework Questions

Help mathematical shell programming

Hello Guys,For my homework I must write a shell script to do this serie, http://upload.wikimedia.org/math/f/8/f/f8f543d9ecd01c4ecca2a0b7bc1234a2.pngI know that I must use the "bc" for that, but for the script's itself i have no idea,(beginner) Can you plz just help me for have some idea?... (1 Reply)
Discussion started by: hamed.samie
1 Replies

7. Shell Programming and Scripting

Translate bash mathematical calculation to awk

this code below is very useful in calculating mean and quartiles. however, i would really like to translate it to awk without having to write to any external file: #!/bin/sh filename="tmp.txt" sort -n $1 >$filename rows=`wc -l $filename|cut -d' ' -f1` q2=`echo "($rows+1)/2" |bc` ... (3 Replies)
Discussion started by: SkySmart
3 Replies

8. Shell Programming and Scripting

Mathematical calculations using shell

Dear All, I read some variables in a file and assigned as name for each of them. If I do echo I am able to see the values as 1.0E-05,3.4,5.0E-03 etc, Now I want to do some mathematical operations with them. Lets say 1 1.0E-05*5.0E-03 expected ans is 5.0E-08 2 1.0E-05/5.0E-03 expected... (9 Replies)
Discussion started by: linuxUser_
9 Replies

9. Shell Programming and Scripting

Calling Bash Functions in the BG

I'm trying to call some functions in the background so that I can multitask in this script. Not working so hot. The functions I call don't ever seem to get called. I'm doing it the exact same way in another script and it's working like a champ so I'm very confused. Here's a pretty simple repro: ... (7 Replies)
Discussion started by: stonkers
7 Replies

10. Shell Programming and Scripting

Bash functions sequence ?

OK, I know function has to be defined first - in sequence - before it can be used. So the script has to be build "bottoms -up style, if you pardon my expression. I am running into a problem reusing function and breaking the sequence. It would be nice to be able to see the function... (10 Replies)
Discussion started by: annacreek
10 Replies
LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME
libbash -- A bash shared libraries package. DESCRIPTION
libbash is a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may want to load and use in scripts of your own. It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries. Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1). A bash shared library that can be loaded using ldbash(1) must answer 4 requirments: 1. It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash). 2. It must contain a line that begins with '#EXPORT='. That line will contain (after the '=') a list of functions that the library exports. I.e. all the function that will be usable after loading that library will be listed in that line. 3. It must contain a line that begins with '#REQUIRE='. That line will contain (after the '=') a list of bash libraries that are required for our library. I.e. every bash library that is in use in our bash library must be listed there. 4. The library must be listed (For more information, see ldbashconfig(8)). Basic guidelines for writing library of your own: 1. Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions. 2. Try to declare all variables intended for internal use as local. 3. Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with: __<library_name>_ For example, internal function myfoosort of hashstash library should be named as __hashstash_myfoosort This helps to avoid conflicts in global name space when using libraries that come from different vendors. 4. See html manual for full version of this guide. AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <ril@ran4.net> SEE ALSO
ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1) Linux Epoch Linux
All times are GMT -4. The time now is 01:56 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy