[R] how to manipulate ... in the argument list

[Jim Lemon]

Hi Witold,
You could try Ben Bolker's "clean.args" function in the plotrix package.

Jim


On Wed, May 11, 2016 at 6:45 PM, Witold E Wolski <wewolski at gmail.com> wrote:
> Hi,
>
> I am looking for a documentation describing how to manipulate the
> "..." . Searching R-intro.html gives to many not relevant hits for
> "..."
>
> What I want to do is something like this :
>
>
> image.2 <- function(x, col , ...){
>  # function is manipulating colors (adding a few)
>  # since it changes colors it needs to update breaks if defined.
>
>   breaks <- list(...)$breaks
>
>  if( !is.null( list(...)$breaks ) ){
>     #manipulate breaks
>
>    image(x, col, breaks = breaks ,...)
>
>   }else{
>      image(x,col ,...)
>   }
> }
>
> but in order to get it working I will need to remove breaks from ...
> since otherwise I am getting multiple defined argument for breaks.
>
> So how to manipulate the "..." argument? Or should I use a different pattern
>
> best
>
>
>
> --
> Witold Eryk Wolski
>
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