Matrix Operations Library
About a year ago, I was working on a project. The project required many matrix operations, that time I really wished that I would find a class or a library with ready functions for matrix manipulations (like addition, inverse, multiplication, etc…) to use in Visual Basic. Unfortunately I could not find such a class, so I decided to write my own class, I called it "cMathLib" . This class gives the user the flexibility to work with matrices and do operations on them. The dimensions of the matrices are neither pre-specified nor limited. The code is highly optimized for fast operation. The code attached contains the class file called with a demonstration on how to use it.
Opperations included in the class are :
Add, Subtract, Determinant, Inverse, Transpose, Multiply, atan2, arc cos, arc sin, PI, Print, MultiplyVectors,Magnitude of a Vector, scalar multiply, and scalar divide.
I really hope this class would be of any help to any of you who needs to work with matrix operations.
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5* (simple, clear & most of all usefull) Some functions may generated for multi-dimencional arrays. If anyone have the time he could writte code independed of array dimensions (maybee checking the number of array dimencions with the error in finding the Ubound etc) (If this comment was disrespectful, please report it.)
1/16/2003 7:12:50 PM:
Excellent, matrix operations can be a pain in the a*s unless you have a programmable calculator. Thanks for sharing it. (If this comment was disrespectful, please report it.)
1/17/2003 4:28:11 AM:
this code is perfect! it's fast, clear n usefull.really thanks for sharing :) (If this comment was disrespectful, please report it.)
Didnt test it jet, but 5 globes(I do belive to descriptions) (If this comment was disrespectful, please report it.)
1/17/2003 7:35:23 AM:
Keep Up the good work, thanks for sharing this code u saved me !!! (If this comment was disrespectful, please report it.)
1/17/2003 1:11:03 PM:
impressive work well explained easy and above all does the work, i never thought that any one would share such a library for free. Thnaks alot, now i can work on my project without writing any matrix functions. the code is fast !! (If this comment was disrespectful, please report it.)
Want to help me take this to vb .net? (If this comment was disrespectful, please report it.)
1/17/2003 5:48:15 PM:
Good work!! you deserve five stars (If this comment was disrespectful, please report it.)
1/17/2003 9:32:39 PM:
cool this class is a saver ,though i wished u had eigen vectors and rank functions in it too!! anyways thanks for sharing it :) (If this comment was disrespectful, please report it.)
its really excellent.. I was looking for this only.. I done this Matrix operationg.. Addition and Subtraction in VB.NET and now goin for more.. like inverse and all, but at the mean time, I found your.. so I get proper logic.. thanks man.. 5 globes from me. (If this comment was disrespectful, please report it.)
1/21/2003 5:49:27 PM:
Hey man its an awesome thing u did there, keep the hard work....urs (If this comment was disrespectful, please report it.)
1/27/2003 1:30:13 AM:
please send matrix library for multi and sum (If this comment was disrespectful, please report it.)
Public Function asin(ByVal X As Double) As Double if x*x-1 then asin=pi/2 else asin = Atn(X / (Sqr(Abs(1 - X * X)) + 1E-200)) endif End Function (If this comment was disrespectful, please report it.)
8/24/2004 4:23:01 PM:
U saved my a*s men, have an assignment from school requiring matrices, very impressive (If this comment was disrespectful, please report it.)
12/27/2004 4:40:43 PM:
problems with download of Visual Basic Matrix routines - any suggestions. Would like to get a copy of the source code for a project I'm working on. (If this comment was disrespectful, please report it.)
1/11/2005 10:12:04 PM:
when I try with this : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
and do operation 5*A I got the result as Answer 5A =
Just an important question: Is that code valide to inverse non-symmetrical matrices or just symmetrical one? (If this comment was disrespectful, please report it.)
Unlike every other atan2 Visual Basic function in the public domain, this one actually appears to work. (if there's one that does work I don't know about, apologies) (If this comment was disrespectful, please report it.)
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1/16/2003 4:44:51 PM: 
