Sponsored Content
Top Forums Shell Programming and Scripting any way to speed up calculations in bash script Post 302277205 by cfajohnson on Thursday 15th of January 2009 04:25:17 PM
Old 01-15-2009
Quote:
Originally Posted by npatwardhan
thanks. i am using bc because the numbers are floating point.. i also tried:

Code:
while [ $j -lt $outer ];do
  i=0
  while [ $i -lt $count1 ];do
    printf "%f\n" "${ARRAY1[k]} - ${ARRAY2[j]}"

Code:
    printf "%f %f\n" "${ARRAY1[k]}" "${ARRAY2[j]}"

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Non-integer calculations in bash

I'm new at scripting but I thought I was getting pretty good at it. I've hit a snag. I try to use expr to compute a fraction say: expr 3 / 4, and I'm getting zero. I guess it's just truncating to the integer, in this case 0, but I need the decimal 0.75. What can I do to compute this value in... (2 Replies)
Discussion started by: jeriryan87
2 Replies

2. Shell Programming and Scripting

Sed or awk script to remove text / or perform calculations from large CSV files

I have a large CSV files (e.g. 2 million records) and am hoping to do one of two things. I have been trying to use awk and sed but am a newbie and can't figure out how to get it to work. Any help you could offer would be greatly appreciated - I'm stuck trying to remove the colon and wildcards in... (6 Replies)
Discussion started by: metronomadic
6 Replies

3. Shell Programming and Scripting

calculations in bash

HI i have following problem, i need to use split command to split files each should be cca 700 lines but i dont know how to inplement it in the scripts becasuse each time the origin file will be various size , any body got any idea cheers (2 Replies)
Discussion started by: kvok
2 Replies

4. Filesystems, Disks and Memory

data from blktrace: read speed V.S. write speed

I analysed disk performance with blktrace and get some data: read: 8,3 4 2141 2.882115217 3342 Q R 195732187 + 32 8,3 4 2142 2.882116411 3342 G R 195732187 + 32 8,3 4 2144 2.882117647 3342 I R 195732187 + 32 8,3 4 2145 ... (1 Reply)
Discussion started by: W.C.C
1 Replies

5. Shell Programming and Scripting

bash script range calculations

Hi, I have data in the following form: AB001 10 AB002 9 AB003 9 etc AB200 5 What I need to do is sum up the second value according to groups of the first, i.e. AB001 to AB030 the total being X, AB031 to AB050 the total being Y etc (there are 5 AB ranges of different sizes). I'm sure... (3 Replies)
Discussion started by: chrissycc
3 Replies

6. Shell Programming and Scripting

Date Calculations using script!!

Hi all, Thanks in Advance , i am very new to programming part in script i think using some caluations+ sed command only we can do this process in script. for exampl: i have file in that one line is like this using sed i can replace the date and all but my requirement is The... (3 Replies)
Discussion started by: anishkumarv
3 Replies

7. Shell Programming and Scripting

Help with Arithmetic calculations in Shell script

Hi, I need a help with arithmetic calculations in my script. I have two variables: a=17; b=1712 I want to perform ($a/$b)*100 with two decimals in the result. I tried with following: res=$((100*a/b)) res=`echo "scale=2; $a / $b" | bc` But I am not getting the decimal values.... (4 Replies)
Discussion started by: karumudi7
4 Replies

8. Shell Programming and Scripting

Arithmetic calculations in bash file

I have 2 numbers xmin = 0.369000018 xmax = 0.569000006 and want to calculate (xmax- xmin) / 5.0 I have tried using $(( )) but is always giving an error (8 Replies)
Discussion started by: kristinu
8 Replies

9. Shell Programming and Scripting

Speed up bash loop?

I am running the below bash loop on all the files of a specific type (highlighted in bold) in a directory. There are 4 awk commands that use the input files to search another and look for a match. The input files range from 27 - 259 and are a list of names. The file that is searched is... (11 Replies)
Discussion started by: cmccabe
11 Replies

10. Shell Programming and Scripting

Speed up extraction od tar.bz2 files using bash

The below bash will untar each tar.bz2 folder in the directory, then remove the tar.bz2. Each of the tar.bz2 folders ranges from 40-75GB and currently takes ~2 hours to extract. Is there a way to speed up the extraction process? I am using a xeon processor with 12 cores. Thank you :). ... (7 Replies)
Discussion started by: cmccabe
7 Replies
SYSPROFILE(8)						      System Manager's Manual						     SYSPROFILE(8)

NAME
sysprofile - modular centralized shell configuration DESCRIPTION
sysprofile is a generic approach to configure shell settings in a modular and centralized way mostly aimed at avoiding work for lazy sysad- mins. It has only been tested to work with the bash shell. It basically consists of the small /etc/sysprofile shell script which invokes other small shell scripts having a .bash suffix which are contained in the /etc/sysprofile.d/ directory. The system administrator can drop in any script he wants without any naming convention other than that the scripts need to have a .bash suffix to enable automagic sourcing by /etc/sysprofile. This mechanism is set up by inserting a small shell routine into /etc/profile for login shells and optionally into /etc/bashrc and/or /etc/bash.bashrc for non-login shells from where the actual /etc/sysprofile script is invoked: if [ -f /etc/sysprofile ]; then . /etc/sysprofile fi For using "sysprofile" under X11, one can source it in a similar way from /etc/X11/Xsession or your X display manager's Xsession file to provide the same shell environment as under the console in X11. See the example files in /usr/share/doc/sysprofile/ for illustration. For usage of terminal emulators with a non-login bash shell under X11, take care to enable sysprofile via /etc/bash.bashrc. If not set this way, your terminal emulators won't come up with the environment defined by the scripts in /etc/sysprofile.d/. Users not wanting /etc/sysprofile to be sourced for their environment can easily disable it's automatic mechanism. It can be disabled by simply creating an empty file called $HOME/.nosysprofile in the user's home directory using e.g. the touch(1) command. Any single configuration file in /etc/sysprofile.d/ can be overridden by any user by creating a private $HOME/.sysprofile.d/ directory which may contain a user's own version of any configuration file to be sourced instead of the system default. It's names have just to match exactly the system's default /etc/sysprofile.d/ configuration files. Empty versions of these files contained in the $HOME/.syspro- file.d/ directory automatically disable sourcing of the system wide version. Naturally, users can add and include their own private script inventions to be automagically executed by /etc/sysprofile at login time. OPTIONS
There are no options other than those dictated by shell conventions. Anything is defined within the configuration scripts themselves. SEE ALSO
The README files and configuration examples contained in /etc/sysprofile.d/ and the manual pages bash(1), xdm(1x), xdm.options(5), and wdm(1x). Recommended further reading is everything related with shell programming. If you need a similar mechanism for executing code at logout time check out the related package syslogout(8) which is a very close compan- ion to sysprofile. BUGS
sysprofile in its current form is mainly restricted to bash(1) syntax. In fact it is actually a rather embarrassing quick and dirty hack than anything else - but it works. It serves the practical need to enable a centralized bash configuration until something better becomes available. Your constructive criticism in making this into something better" is very welcome. Before i forget to mention it: we take patches... ;-) AUTHOR
sysprofile was developed by Paul Seelig <pseelig@debian.org> specifically for the Debian GNU/Linux system. Feel free to port it to and use it anywhere else under the conditions of either the GNU public license or the BSD license or both. Better yet, please help to make it into something more worthwhile than it currently is. SYSPROFILE(8)
All times are GMT -4. The time now is 08:47 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy