[R] how to extract options for a function call

[Henrique Dallazuanna]

Try this:

For optim:
eval(formals(optim)$method)

For dist function:
 eval(body(dist)[[3]][[3]])

On Mon, Apr 18, 2011 at 10:56 AM, fisken <torpedofisken at gmail.com> wrote:
> Hi, I'm having some difficulties formulating this question.
>
> But what I want,
> is to extract the options associated with a parameter for a function.
>
> e.g.
> method = c("Nelder-Mead", "BFGS", "CG", "L-BFGS-B", "SANN")
> in the optim function.
>
> So I would like to have a vector with
> c("Nelder-Mead", "BFGS", "CG", "L-BFGS-B", "SANN")
>
>
> Or for instance the 'method' in the dist function can be supplied with
> euclidian,maximum,manhatten, canberra,binary,minkowski.
>
> Is there someway to extract this so I would have a vector with
> c("euclidian","maximum","manhatten", "canberra","binary","minkowski").
>
>
> Thanks
>
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-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O