See ?uniroot:
> uniroot(irr.in, c(-1, 1), c1=-100, c2=60, c3=70)
$root
[1] 0.1888196
$f.root
[1] -1.514979e-05
$iter
[1] 8
$estim.prec
[1] 6.103516e-05
Warning message:
NA/Inf replaced by maximum positive value
Andy
> From: [EMAIL PROTECTED]
>
> hi: could someone please point me to a function that allows me to
> solve general non-linear functions?
>
> > irr.in <- function(r, c1, c2, c3 ) { return(c1+c2/(1+r) +
> c3/(1+r)^2); }
> > solve.nonlinear( irr.in, -100, 60, 70 );
> 0.189
>
> If someone has written an irr function, this would be helpful,
> too---though not difficult to write, either. thanks for any pointers.
>
> Regards,
>
> /iaw
> ---
> ivo welch
>
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