Sponsored Content
Top Forums Shell Programming and Scripting Perl - maths equation - need help Post 302288352 by pludi on Tuesday 17th of February 2009 03:55:09 AM
Old 02-17-2009
Perl doesn't support that out-of-the-box, but maybe this can help you: Math::Symbolic - Symbolic calculations - search.cpan.org (First & Third result when searching for "perl symbolic math")
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Problem with Maths

Heres a script i wrote as a bit of practise. What it does is insert a line in the middle of a file. The line being $1 and the file being $2 #!/bin/bash rm tempfile touch tempfile count=1 linenum= `wc -l < $2` if then echo $1 >> $2 else even=`expr "$linenum" % 2` if then... (3 Replies)
Discussion started by: Quesa
3 Replies

2. UNIX for Dummies Questions & Answers

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. (4 Replies)
Discussion started by: robbinGlasses
4 Replies

3. Shell Programming and Scripting

AWK equation evaluation.

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

4. Shell Programming and Scripting

Maths with variables

Hello, I'm trying to write a while loop for a decimal value in tcsh which I know can't be done. Instead I want my increments to be one order of magnitude too large and then divide it by 10 when I use the variable. However, I don't know how to divide my variable and set it as another. set... (1 Reply)
Discussion started by: DFr0st
1 Replies

5. High Performance Computing

Performance Equation

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

6. Shell Programming and Scripting

Using IF statements with maths where the input is not an integer

Hi All I've made a few scripts which using GDAL extract the value of a pixel within a given raster. The purpose is to work out the combine value of every pixel. I thought there may have been an easier way to do this but alas! The code below extracts the pixel value at position X Y. The... (3 Replies)
Discussion started by: StudentFitz
3 Replies

7. Shell Programming and Scripting

Simple maths calculator loop.

Hi, I am trying to make a maths calculator that: 1. Prompts the user for a number. 2. Prompts the user for an operation (add, subtract, divide or multiply) 3. Prompts the user for a number. 4. Prompts the user for another operation (same as above) OR the option to get the result for the... (4 Replies)
Discussion started by: johnthebaptist
4 Replies

8. Shell Programming and Scripting

Maths in shell scripts

Hi, Need help on this. I need to increment a variable by 1 but retain as 2 characters. I am using expr to do additions: NEWSERIAL=`expr $SERIAL + 1` $SERIAL can range from 01-99. After adding "1", I need the result to be 2 characters, eg: 02+1 = 03. By default expr will truncate the... (4 Replies)
Discussion started by: vchee
4 Replies

9. Shell Programming and Scripting

Help with insert a value equation in bash script

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

10. Shell Programming and Scripting

Calculate the constant e to 14+ decimal places using integer maths.

Hi guys... I am loving this integer maths thing. 64 bit systems are certainly easier than 32 bit, but hey, I don't intend to leave out my fav' platform. Using one of the 'Brothers' methods, URL inside the code. #!/bin/sh # # #!/usr/local/bin/dash # e_constant.sh # Brother's formula . #... (2 Replies)
Discussion started by: wisecracker
2 Replies
Math::Symbolic::AuxFunctions(3pm)			User Contributed Perl Documentation			 Math::Symbolic::AuxFunctions(3pm)

NAME
Math::Symbolic::AuxFunctions - Auxiliary functions for Math::Symbolic hierarchy SYNOPSIS
use Math::Symbolic::AuxFunctions; Math::Symbolic::AuxFunctions::acos($x); # etc DESCRIPTION
This module contains implementations of some auxiliary functions that are used within the Math::Symbolic hierarchy of modules. In particular, this module holds all trigonometric functions used for numeric evaluation of trees by Math::Symbolic::Operator. EXPORT None. On purpose. If I wished this module would pollute others' namespaces, I'd have put the functions right where they're used. TRIGONOMETRIC FUNCTIONS
tan Computes the tangent sin(x) / cos(x). cot Computes the cotangent cos(x) / sin(x). asin Computes the arc sine asin(z) = -i log(iz + sqrt(1-z*z)). Above formula is for complex numbers. acos Computes the arc cosine acos(z) = -i log(z + sqrt(z*z-1)). Above formula is for complex numbers. atan Computes the arc tangent atan(z) = i/2 log((i+z) / (i-z)). Above formula is for complex numbers. acot Computes the arc cotangent ( atan( 1 / x ) ). asinh Computes the arc hyperbolic sine asinh(z) = log(z + sqrt(z*z+1)) acosh Computes the arc hyperbolic cosine acosh(z) = log(z + sqrt(z*z-1)). OTHER FUNCTIONS
binomial_coeff Calculates the binomial coefficient n over k of its first two arguments (n, k). Code taken from Orwant et al, "Mastering Algorithms with Perl" bell_number The Bell numbers are defined as follows: B_0 = 1 B_n+1 = sum_k=0_to_n( B_k * binomial_coeff(n, k) ) This function uses memoization. AUTHOR
Please send feedback, bug reports, and support requests to the Math::Symbolic support mailing list: math-symbolic-support at lists dot sourceforge dot net. Please consider letting us know how you use Math::Symbolic. Thank you. If you're interested in helping with the development or extending the module's functionality, please contact the developers' mailing list: math-symbolic-develop at lists dot sourceforge dot net. List of contributors: Steffen Mueller, symbolic-module at steffen-mueller dot net Stray Toaster, mwk at users dot sourceforge dot net Oliver Ebenhoeh SEE ALSO
New versions of this module can be found on http://steffen-mueller.net or CPAN. The module development takes place on Sourceforge at http://sourceforge.net/projects/math-symbolic/ Math::Symbolic perl v5.10.1 2011-01-01 Math::Symbolic::AuxFunctions(3pm)
All times are GMT -4. The time now is 09:22 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy