Yes! Perfect! Thank you very much Michael! I need to get my head around
that do.call(). I'll read up on it....
Thanks again!
Ben
On Tue, May 15, 2012 at 11:48 AM, R. Michael Weylandt <
michael.weyla...@gmail.com> wrote:
> Are you perhaps looking for the do.call() construction?
>
> z = Intervals(c(1,10))
> y = Intervals(c(5,10))
> x = Intervals(c(4,6))
>
> do.call("interval_intersection", list(x,y,z))
>
> Michael
>
> On Tue, May 15, 2012 at 12:46 PM, Ben quant <ccqu...@gmail.com> wrote:
> > Hello,
> >
> > Thanks in advance for any help!
> >
> > How do I pass an unknown number of objects into the "..." (dot dot dot)
> > parameter? Put another way, is there some standard way to pass multiple
> > objects into "..." to "fool" the function into thinking the objects are
> > passed in separately/explicitly with common separation (like "x,y,z" when
> > x, y and z are objects to be passed into "...")?
> >
> > Details:
> >
> > I'm working with this parameter list and function:
> >
> > interval_intersection(x, ..., check_valid = TRUE)
> >
> > To illustrate...
> >
> > This works and I get the expected interval:
> >
> > library('intervals')
> > # create individual Intervals objects
> > z = Intervals(c(1,10))
> > y = Intervals(c(5,10))
> > x = Intervals(c(4,6))
> >> interval_intersection(x,y,z)
> > Object of class Intervals
> > 1 interval over R:
> > [5, 6]
> >
> > ...but at run time I don't know how many Intervals objects I will have
> so I
> > can't list them explicitly like this "x,y,z". So I build a matrix of
> > Intervals (per the package manual) and the function doesn't work:
> >
> >> xyz = matrix(c(4,5,1,6,10,10),nrow=3)
> >> xyz
> > [,1] [,2]
> > [1,] 4 6
> > [2,] 5 10
> > [3,] 1 10
> >> xyz_interval = Intervals(xyz)
> >> interval_intersection(xyz_interval)
> > Object of class Intervals
> > 1 interval over R:
> > [1, 10]
> >
> > ...[1,10] is unexpected/wrong because I want the intersection of the
> three
> > intervals. So I conclude that I need to pass in the individual Intervals
> > objects, but how do I do that if I don't know how many I have at run
> time?
> > I tried putting them in a list, but that didn't work. I also tried using
> > paste( ,sep=',') and get().
> >
> > Is there some standard way to pass multiple objects into "..." to "fool"
> > the function into thinking they are passed in separately/explicitly with
> > common separation?
> >
> > Thanks!
> > ben
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@r-project.org 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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