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Nonlinear Equation Solve
From: |
Dmitri A. Sergatskov |
Subject: |
Nonlinear Equation Solve |
Date: |
Tue, 14 Feb 2012 15:31:31 -0600 |
---------- Forwarded message ----------
From: Dmitri A. Sergatskov <address@hidden>
Date: Tue, Feb 14, 2012 at 3:17 PM
Subject: Re: Nonlinear Equation Solve
To: "Thomas D. Dean" <address@hidden>
On Tue, Feb 14, 2012 at 2:22 PM, Thomas D. Dean <address@hidden> wrote:
> fsolve (@eqnsetf,y',optimset("TolX",1e-20,"TolFun",1e-20));
>> info
> info = 0
>
> If I reduce the tol's, fsolve does not reach a solution.
>
>> [x, fval, info] =
> fminunc (@eqnsetf,y',
> optimset("TolX",1e18,"TolFun",1e18,"ComplexEqn","on"));
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This is kind of too radical (or did you actually used 1e-18?).
Try 1e-4 or may be 1e-8
Tolerances that is much smaller than eps look suspicious to me.
> Tom Dean
Dmitri.
--
- Nonlinear Equation Solve, Thomas D. Dean, 2012/02/14
- Message not available
- Nonlinear Equation Solve,
Dmitri A. Sergatskov <=
- Re: Nonlinear Equation Solve, Thomas D. Dean, 2012/02/14
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- Re: Nonlinear Equation Solve, Thomas D. Dean, 2012/02/14
- Re: Nonlinear Equation Solve, Dmitri A. Sergatskov, 2012/02/14
- Re: Nonlinear Equation Solve, Thomas D. Dean, 2012/02/14
- Re: Nonlinear Equation Solve, Olaf Till, 2012/02/15
- Re: Nonlinear Equation Solve, Olaf Till, 2012/02/15