https://github.com/uroboro/mathlib

A compilation of matricial functions
https://github.com/uroboro/mathlib

Last synced: 25 days ago
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A compilation of matricial functions

• Host: GitHub
• URL: https://github.com/uroboro/mathlib
• Owner: uroboro
• Created: 2011-10-23T00:08:35.000Z (about 13 years ago)
• Default Branch: master
• Last Pushed: 2013-12-02T13:11:49.000Z (almost 11 years ago)
• Last Synced: 2023-06-28T14:15:38.134Z (over 1 year ago)
• Language: C
• Homepage:
• Size: 176 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: changelog.txt

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README

        
MatrixLib

=========

Brief overview:

Matrix library written in C that is able to manage bidimensional matrices and provide information about them. It is possible to operate with the basic functions such as inversion, transposition, multiplication and determinant.

Features:

+ single matrix struct containing:

 - float matrix

 - size

 - properties in Boolean format

+ ordered list manager:

 - add matrices with the following options:

  * input manually

  * initialise as identity

  * initialise with one number

 - remove them from memory

 - show single matrices

 - show the complete list of matrices

+ autosave and autoload matrices for later usage

+ functions that inform if a matrix is:

 - symmetrical

 - antisymmetrical

 - triangular

 - diagonal

 - identity

 - orthogonal

+ functions that operate with a single matrix:

 - opposite

 - transpose

 - adjugate

 - invert

 - multiply (by a scalar number)

+ functions that operate with two matrices

 - add/subtract

 - multiply

 - multiply/divide like addition/subtraction

 - copy

 - check equality

History:

I began coding this library in July 2011, when I had half a year of coding in C experience. But back then I started with a program that only calculated the determinant of any given square matrix. It used float pointers and an int to know the size.

In September I decided to go a step further and incorporate other matrix functions, as well as structs for ease of use, having the pointer and size in a single variable.

To-do list:

- "translate" into Obj-C, into iPhone app.

- functions for column and row spaces.

- resolve n eqs with n vars (using Cramer and the inverse of A in A*X=B, X=Inv(A)*B.

- make mflib.c into dylib, opening the way to a plugin system.

- modify mtxlib.c functions so that they take an int and a matrix array. then, functions like addition can add several matrices at a time.

- add a zero sign checker so as to not have -0 values

- make mtxnode have (void*)data so it is reusable