[R] solving equations

[Thomas Lumley]

On Fri, 30 Aug 2002, Antonio Olinto wrote:

> Dear R-users,
>
> I'm trying to solve the following equation:
>
> F=25*(F+0.2)/22.2/(EXP(F+0.2)-1)
>
> In Excel I found F=0.696176718 but I'd like to know how to use R to solve
> it. I tried, without success, to use "solve".
>

Use uniroot()

R> uniroot(function(F) F-25*(F+0.2)/22.2/(exp(F+0.2)-1), c(0,10))
$root
[1] 0.695973

$f.root
[1] -9.561183e-06

$iter
[1] 4

$estim.prec
[1] 6.103516e-05


	-thomas

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