I should have mentioned is that the way it works is that
it uses the name of the list component, if any, otherwise
it uses the name of the function if its given as a name
and otherwise it uses the function itself or possibly the
name of the list.
>
> On 10/5/06, Gabor Grothendieck <[EMAIL PROTECTED]> wrote:
> > Probably the best you can hope for is to cover
> > most cases. This one uses match.call and handles
> > a number of cases and perhaps if you spend more time
> > on it might be able to add some cases where it fails
> > such as the second L below:
> >
> > f <- function(x) {
> > if (!is.list(x)) x <- list(x)
> > if (is.null(names(x))) names(x) <- ""
> > names(x)[names(x) == ""] <- NA
> > mc <- match.call()[-1][[1]]
> > if (length(mc) > 1) mc <- mc[-1]
> > ifelse(is.na(names(x)), as.character(mc), names(x))
> > }
> >
> > f(c(a = mean))
> > f(list(a = mean, b = sd))
> > f(c(f = function(x)x*x))
> > f(list(f = function(x)x*x, function(x)1-x))
> > L <- list(a = mean, b = sd)
> > f(L)
> > L <- list(a = mean, function(x)x)
> > f(L)
> >
> > f(mean)
> > f(list(a = mean, sd))
> > f(list(mean, sd))
> > f(function(x)x*x)
> > f(list(function(x)x*x, function(y)y-1))
> >
> >
> > On 10/5/06, Søren Højsgaard <[EMAIL PROTECTED]> wrote:
> > > I've defined the function
> > >
> > > getFunNames <- function(FUN){
> > > if (!is.list(FUN))
> > > fun.names <- paste(deparse(substitute(FUN)), collapse = " ")
> > > else
> > > fun.names <- unlist(lapply(substitute(FUN)[-1], function(a) paste(a)))
> > > fun.names
> > > }
> > >
> > > which gives what I want :
> > > > getFunNames(mean)
> > > [1] "mean"
> > > > getFunNames(ff)
> > > [1] "ff"
> > > > getFunNames(c(mean,ff))
> > > [1] "mean" "ff"
> > >
> > > If I call this within a function, things go wrong:
> > > 1] "FUN"
> > > > foo(ff)
> > > [1] "FUN"
> > > > foo(c(mean,ff))
> > > Error in substitute(FUN)[-1] : object is not subsettable
> > >
> > > Obviously there are some things (quite a few things) which I have not
> > > understood. Can anyone help?
> > > Thanks
> > > Søren
> > >
> > > ______________________________________________
> > > R-help@stat.math.ethz.ch mailing list
> > > 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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