help me with nonlinear Project

2015 1 15

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更新时间：2021 8 20

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I need to compute this nonlinear equations with Jacobian

x^5 + y^3 * z^4 + 1, x^2 * y * z, z^4 - 1.

Can anyone help me, because non of the examples on mathlab are for this kind of equations....

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Mohammad Abouali 2015-1-15

what do you mean by "... compute this nonlinear equations with Jacobian"?

You want to calculate the Jacobian of it?

Ana Garvanlieva 2015-2-27

So i Insert theese comands

>> syms x1 x2 x3

>> J1 = jacobian([x1^5 + x2^3*x3^4 + 1; x1^2*x2*x3; x3^4-1],[x1;x2;x3])

>> x3=0

How to call the matrix now?

When I call it with

>> J1 = jacobian([x1^5 + x2^3*x3^4 + 1; x1^2*x2*x3; x3^4-1],[x1;x2;x3])

i get

J1 =

[ 5*x1^4, 0, diff(x1^5 + 1, 0)]

[ 0, 0, diff(0, 0)]

[ 0, 0, diff(-1, 0)]

And why do I need inv(J) for x0=(-.01, -.01, -.01)^T???

Thank you verry much for your responces...

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