[R] Solving two nonlinear equations and two knowns

[Dieter Menne]

yhsu6 wrote:
> 
> I have two nonlinear equations, f1(x1,x2)=0 and f2(x1,x2)=0. I try to use
> optim command by minimize f1^2+f2^2 to find x1 and x2. I found the optimal
> solution changes when I change initial values. How to solve this?
> 
> BTW, I also try to use grid searching. But I have no information on ranges
> of x1 and x2, respectively.
> 
> 

See:

http://markmail.org/message/w7bymjr6awihos73

But if you have no idea of the ranges of x1 and x2, it will be difficult.


Dieter


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