Hi Christofer,
Before you made the change that I suggested, your program was stopping at
the statement: list(...) = list(..) .etc
This means that it never tried to execute the statement:
return(lapply(X,FUN,...))
Now that you have made the change, it gets past the first statement and
tries to execute the statement: return(lapply(X,FUN,...)).
That attempt is generating the error message because whatever you are
passing in as the FUN argument is not expecting extra arguments.
HTH,
Eric
On Sun, Mar 4, 2018 at 6:52 PM, Christofer Bogaso <
bogaso.christo...@gmail.com> wrote:
> @Eric - with this approach I am getting below error :
>
> Error in FUN(X[[i]], ...) : unused argument (list())
>
> On Sun, Mar 4, 2018 at 10:18 PM, Eric Berger <ericjber...@gmail.com>
> wrote:
> > Hi Christofer,
> > You cannot assign to list(...). You can do the following
> >
> > myList <- list(...)[!names(list(...)) %in% 'mc.cores']
> >
> > HTH,
> > Eric
> >
> > On Sun, Mar 4, 2018 at 6:38 PM, Christofer Bogaso
> > <bogaso.christo...@gmail.com> wrote:
> >>
> >> Hi,
> >>
> >> As an example, I want to create below kind of custom Function which
> >> either be mclapply pr lapply
> >>
> >> Lapply_me = function(X = X, FUN = FUN, ..., Apply_MC = FALSE) {
> >> if (Apply_MC) {
> >> return(mclapply(X, FUN, ...))
> >> } else {
> >> if (any(names(list(...)) == 'mc.cores')) {
> >> list(...) = list(...)[!names(list(...)) %in% 'mc.cores']
> >> }
> >> return(lapply(X, FUN, ...))
> >> }
> >> }
> >>
> >> However when Apply_MC = FALSE it generates below error saying :
> >>
> >> '...' used in an incorrect context
> >>
> >>
> >> Appreciate if you can help me with the correct approach. Thanks,
> >>
> >>
> >> On Sun, Mar 4, 2018 at 9:34 PM, Duncan Murdoch <
> murdoch.dun...@gmail.com>
> >> wrote:
> >> > On 04/03/2018 10:39 AM, Christofer Bogaso wrote:
> >> >>
> >> >> Hi again,
> >> >>
> >> >> I am looking for some way to alternately use 2 related functions,
> >> >> based on some ifelse() condition.
> >> >>
> >> >> For example, I have 2 functions mclapply() and lapply()
> >> >>
> >> >> However, mclapply() function has one extra parameter 'mc.cores' which
> >> >> lapply doesnt not have.
> >> >>
> >> >> I know when mc.cores = 1, these 2 functions are essentially same,
> >> >> however I am looking for more general way to control them within
> >> >> ifelse() constion
> >> >>
> >> >> Can someone please help me how can I use them within ifelse()
> >> >> condition.
> >> >
> >> >
> >> > Don't. ifelse() usually evaluates *both* the true and false values,
> and
> >> > then selects entries from each. Just use an if statement.
> >> >
> >> > Duncan Murdoch
> >>
> >> ______________________________________________
> >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide
> >> http://www.R-project.org/posting-guide.html
> >> and provide commented, minimal, self-contained, reproducible code.
> >
> >
>
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