Problem on solving nonlinear algebraic equations

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Lwei
Lwei 2011-8-9
I'm trying to solve a nonlinear algebraic equation set with 16 eqns. The problem is that these equations are highly ill-conditioned. (Coefficients for some equations are 10^8 larger than others )
I've tried "fsolve" to solve it, but it's not working.
Is there any options in fsolve to deal with ill-conditioned equations?
Thanks!!!

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回答（2 个）

Lwei
Lwei 2011-8-10
Any help?
Walter Roberson
Walter Roberson 2011-8-10
Perhaps move it to within MuPad and do the solve() computation with Digits set to a significantly higher number?
The result will still be extremely sensitive to perturbations in the original data, but you will at least be able to get a result.

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