Le ven. 4 avr. à 18:03, ZT2008 a écrit :
>
>
> ... can be used to represent unknown number of parameters passed
> into a
> function.
>
> For example, I write a function g. g calls another function f1.
>
> For example f1 could be different random number generation function.
>
> when f1=rnorm(), it has 3 parameters n, mean and standard deviation.
>
> when f1=rexp(), it has 2 parameters n and rate.
>
> g can be defined as
>
> g <- function(f1, ...) {
> f1(...)
> }
>
> My problem is what about g calls two functions with unknown number of
> parameters.
>
> In this case one ... doesn't help.
>
> If I define g as follows:
>
> g <- function(f1, f2, ...) {
> f1(...)+f2(...)
> }
>
> It seems ... is only passed to f1, it can't be passed to f2.
You should get around what you want with something along the lines of
dots <- list(...)
argf <- formals(f)
argg <- formals(g)
and then extracting from 'dots' elements corresponding to 'argf' and
'argg' (using their names).
HTH
>
>
> Can anybody help me? Thanks!
>
> --
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>
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---
Vincent Goulet, Associate Professor
École d'actuariat
Université Laval, Québec
[EMAIL PROTECTED] http://vgoulet.act.ulaval.ca
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