[R] solving nonlinear system of equations

[Gabor Grothendieck]

Minimize the sum of the squares of the differences between the
two sides:

optim(c(1,1), function(x) exp(x[1]-x[2])^2 + log(x[2])^2)


On 3/24/06, allan_sta_staff_sci_main_uct at mail.uct.ac.za
<allan_sta_staff_sci_main_uct at mail.uct.ac.za> wrote:
> hi all
>
> i have been searching through the archives in search for some help and it seems
> to have been fruitless - thus the mail. i saw some mail relating to mathomatic
> and maxima. mathomatic only works for simpel functions - as per the mail and
> does not support logs ...- and i am not familiar with maxima. i would
> preferably want to use an R function.
>
>
>
> is there a function that can solve a system of non linear equations. i dont have
> any data - ie as per nls.
>
>
>
> so a trivial example would be:
>
> exp(a) = v
> log(v) = 0
>
>
>
> and we need to solve for v and a.
>
> hoping someone can help.
> /
> allan
>
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