On 6/23/05, Martin Maechler <[EMAIL PROTECTED]> wrote: > >>>>> "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. >
Also if you are referring to the chron package then the names of the chron classes are 'dates' and 'times' -- not 'chron'. R> library(chron) R> example(chron) ...snip... R> class(dts) [1] "dates" "times" ______________________________________________ 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