It's an error in your usage The args of new() are
> args(new)
function (Class, ...)
and what does 'C' match? You need to name your arguments here.
On Mon, 17 Apr 2006, Paul Gilbert wrote:
> "C" appears to be an illegal name for a slot in an S4 class
(example
> below).
It is rather an example of something which does not work.
foo <- new("testobj")
foo at C <- 2
does, for example.
> If this is a known limitation, and not a bug, it would be nice
> if it were caught by setClass.
>
> Paul Gilbert
>
> > setClass("testobj", representation ( C =
"numeric"))
> [1] "testobj"
> > new("testobj", C= 2)
> Error in methodsPackageMetaName("C", name) :
> 'The name of the object (e.g,. a class or generic function) to
> find in the meta-data' must be a single string (got an object of class
> "numeric")
>
> > setClass("testobj", representation ( C. =
"numeric"))
> [1] "testobj"
> > new("testobj", C.= 2)
> An object of class "testobj"
> Slot "C.":
> [1] 2
>
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--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
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