How can I import previously created math functions?

Contributed by bladx on Sep 04, 2001 at 01:20 UTC
Q&A > math

Description:

Are there other modules other than the basic MATH module(s) that contain libraries of common equations, as to alleviate writing out each individual equation?

Answer: How can I import previously created math functions?
contributed by Zaxo

PDL is an extension which gives high speed matrix operations, and more. It has been used a lot for graphics and for scientific computing.

Gsl is a yet-incomplete extension which uses the Gnu Scientific Library (GSL). It is a wip, only in version 0.03. So far it has bindings for calculating special functions. I was unable to install it due to hardcoded paths which disagreed with my gsl tree.

Answer: How can I import previously created math functions?
contributed by ariels

The amazing Inline module offers help here, too. Not all <math.h> functions are available in Perl (even if you use POSIX;).

Here's how to print some erf() values, for instance (a function almost certainly available in your maths library):

perl -le 'use Inline C => q{ double erf(double); }, ENABLE => "AUTOWRA
+P"; print "$_ ",erf($_) for (0..5)'
[download]

You can of course write it into your modules, and use it to access you own libraries.

Other C wrapping options are XS (of course) and Swig.

Answer: How can I import previously created math functions?
contributed by randyk

The Math::Cephes module contains an interface to math functions of Stephen Moshier's cephes math library. Interfaces are also included to handle some common polynomial, matrix, fraction, and complex number operations.

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