[R] FW: S4 classes, creating in C

[Richard A. O'Keefe]

	Laurence Kell FM CEFAS <L.T.Kell at cefas.co.uk> asked about
	> setClass("LUdecomposition", representation(a="matrix", pivot = "integer"),
	>                             prototype=list(pivot = NA)                    )
	> 
	> then I get the following error message in R 1.7.1 but not R 1.7.0
	> 
	> Error in makePrototypeFromClassDef(properties, ClassDef, immediate) :
	>         In making the prototype for class "LUdecomposition" elements of the
	> prototype
	>         failed to match the corresponding slot class: pivot (class " integer
	> ")
	> 
	> Why  can I no longer use the prototype to set the default values?
	
The prototype says 'pivot = "integer"'.
Had you noticed in the R language PDf file that typeof(NA) = "logical"?
What happens when you try

    prototype=list(pivot=as.integer(NA))

instead?