R help - Jul 2008 - How to solve systems of nonlinear equations in R?

Hey,
I was wondering if there existed a R function similar to 'fsolve'  or
'fzero' Matlab functions?
Thanks!
Francois Aucoin

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Francois
You might try the BB package, which has quite a nice example.
Stuart

On Sat, 19 Jul 2008 10:20:34 +1000, Fran?ois Aucoin  
<frank.aucoin at gmail.com> wrote:
> Hey,
> I was wondering if there existed a R function similar to 'fsolve' 
or
> 'fzero' Matlab functions?
> Thanks!
> Francois Aucoin
>
> 	[[alternative HTML version deleted]]
>
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Fran?ois Aucoin wrote:
> 
> Hey,
> I was wondering if there existed a R function similar to 'fsolve' 
or
> 'fzero' Matlab functions?
> 
> 
For a single function of one variable you can use uniroot.
Use ?uniroot in R to find out more.
You can also try general purpose optimisation algorithms such as optim/nlm,
but they don't always find a solution and they are not very efficient for
systems of equations.

I am working on a package for solving (dense) non linear systems of
equations using Broyden/Newton and global search methods. But it isn't ready
yet and it will take time ...

Berend
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