>>>>> "Sebastian" == Sebastian Luque <[EMAIL PROTECTED]>
>>>>> on Wed, 22 Jun 2005 15:50:50 -0500 writes:
Sebastian> I'd like to define a class with a chron slot, but:
R> require(chron)
R> setClass("myclass", representation(datetime = "chron"))
Sebastian> [1] "myclass"
Sebastian> Warning message:
Sebastian> undefined slot classes in definition of "myclass":
datetime(class "chron")
Sebastian> in: .completeClassSlots(ClassDef, where)
Sebastian> How should such a class be defined?
You need to first make "chron" into a (pseudo-) S4 class,
using setOldClass()
Then you can extend it or use it as slot class.
Martin Maechler, ETH Zurich
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