I need this code

[greenflame]

I need code to compute the determinant and inverse of a matrix. for
example the determinant and inverse of:

[1 2 3 0]
[4 5 6 1]
[7 8 9 2]
[0 1 2 3]

[commercial]

You need to isolate parameters first.

that is make it valid as
you would with paper/pencil and a brain only.

var obj = []
obj[0] = [1, 2, 3, 0]
obj[1] = [4 ,5, 6, 1]
obj[2] = [7 ,8, 9, 2]
obj[3] = [0 ,1, 2, 3]

Now this can bee "seen"

-> alert( obj )

----------------

determinant means exactly that
a matrix it becomes automatically
anything inverse can be derived

Hope that helps STUPID


"greenflame " <al*********@ya hoo.com> wrote in message
news:11******** *************@g 44g2000cwa.goog legroups.com...

I need code to compute the determinant and inverse of a matrix. for
example the determinant and inverse of:

[1 2 3 0]
[4 5 6 1]
[7 8 9 2]
[0 1 2 3]

[Randy Webb]

greenflame wrote:

I need code to compute the determinant and inverse of a matrix.
Then write code to do it. Then post your best attempt.
for example the determinant and inverse of:

[1 2 3 0]
[4 5 6 1]
[7 8 9 2]
[0 1 2 3]

Looks more like your homework. Is it?

--
Randy
comp.lang.javas cript FAQ - http://jibbering.com/faq & newsgroup weekly

[greenflame]

This is for a project of mine to make a mini mathematica. I will try to
do it but I am not sure if you all will understand the matrix math.

[Random]

greenflame wrote:

This is for a project of mine to make a mini mathematica. I will try to
do it but I am not sure if you all will understand the matrix math.

.... so you asked us to write the code to do the math that you don't
think we'd understand?

Now that I don't understand.

Keep me posted, though. I am curious.

[RobG]

greenflame wrote:

This is for a project of mine to make a mini mathematica. I will try to
do it but I am not sure if you all will understand the matrix math.

This link (on the Wolfram site) provides a general method for
finding the determinant of an n_x_n matrix.

<URL:http://mathworld.wolfr am.com/Determinant.htm l>
The "expansion by minors" technique is explained here:

<URL:http://mathworld.wolfr am.com/DeterminantExpa nsionbyMinors.h tml>
No doubt you can develop a specific solution for a 4x4 matrix and
hard-code that, or you could produce a general solution that finds the
determinant of any size square matrix. Depending on how you wish to
approach this, the solution will be very different.

You will likely get more assistance if you provide an algorithm that
you are trying to implement, that way you will get input from those
whose forte is optimisation of JavaScript regardless of whether they
understand the mathematics involved (and don't presume they don't).

I played with Mathematica some years ago - had I been able to apply all
the mathematical knowledge I have ever learned (or even stumbled
across), I doubt that I would even have scratched the surface of its
considerable capabilities.

Good luck in your quest!
--
Rob

[greenflame]

Thanks Rob I will check those sites out. And I will keep you posted.