Matrix and Inverse matrix

[Budiman]

Hello friends, i need help for my assignment.
For example i give input for a, b, c, d in matrix mode example like
|a b|
|c d|
and i want to convert it to invers from that matrix, i hope you give the answer(if possible with the explanation).
Thx so much for your help

[Killer42]

Hello friends, i need help for my assignment.
For example i give input for a, b, c, d in matrix mode example like
|a b|
|c d|
and i want to convert it to invers from that matrix, i hope you give the answer(if possible with the explanation).
Thx so much for your help

Have you made any sort of a start on this?

[Budiman]

Have you made any sort of a start on this?

Sorry i don't understand your question.
Can you just make the program?
in 4 variable in matrix i want it to be invers matrix

[sashi]

Sorry i don't understand your question.
Can you just make the program?
in 4 variable in matrix i want it to be invers matrix

Hi there,

Killer42 was trying to ask if you have started your initial programming, hope you understand clearly now. Sorry, at the TheScripts we do not provide programming services, instead, we help programmers to debug their code segment. Take care.

[Killer42]

Killer42 was trying to ask if you have started your initial programming, hope you understand clearly now. Sorry, at the TheScripts we do not provide programming services, instead, we help programmers to debug their code segment.

Or to put it another way, we're here to help, not to do everything for you.

[Budiman]

ooo i understand that situation, actually i don;t understandf anything in visual basic but i can understand in C++. My teacher ask me to make program in visual basic.
First i need your help to teach me alittle bit or you please give me your thinking than i make the program my self

[dwadish]

Hello friends, i need help for my assignment.
For example i give input for a, b, c, d in matrix mode example like
|a b|
|c d|
and i want to convert it to invers from that matrix, i hope you give the answer(if possible with the explanation).
Thx so much for your help

i will help you with a suitable example tomorrow.

[Killer42]

i will help you with a suitable example tomorrow.

Actually, I'm glad someone can help. I didn't really follow the question all that well, and don't know anything much about matrices.

[DeMan]

Basically, we want to try to conver the matrix into
|1 0|
|0 1| (called I)

and record what we do on another I matrix. If an inverse exists we will be able to reduce our matrix to the I matrix. Thus we could begin:
|a, b|
|c, d|
and reduce it into row echelon form (hopefully ending in I), while keeping track of our steps with a copy of I.

Thankfully there are shortcuts that have been found, and for a 2D matrix it makes things pretty simple. Let us assume we have a matrix :

|a, b|               = A
|c, d|
 

we first calculate the determinant =ad -bc

Then the inverse matrix (assuming the determinant (denoted |A| ) is

1/|A|     *      |d, -b|
                 |-c, a|
 

ie:

|d/(ad-bc), b/(bc-ad)|
|c/(bc-ad), a/(ad-bc)| //notice I have eliminted the signs by swapping the order of the eq'n in the denominator
 

Incidentally (and I'm sure you're not really interested, but this idea can be extended for larger matrices also).

THUS: All you need to do is write code to take 4 inputs (from text boxes arranged as a matrix) and to output four labels (again arranged as a matrix) solved using the equations above. Hope this helps!!! (If you are still having trouble, I may be able to help, but as I mentioned VB is not really my forte'....)

[vba]

Plz i want a VB code for matrix inverse as early as possible.plz can u help me.