Paul Gilbert pgilbert@bank-banque-canada.ca
Wed, 30 Sep 1998 11:38:20 -0400


I think your fix clobbered mine for NULL assignment and when I went to test a
combined version I discovered that somewhere in the setting of the tsp attr
there is already the check you proposed, and also some other sanity checks. So
my fix for NULL assignment (below again) seems to be the only problem. "tsp<-"
might be a more logical place to put these checks then in attr, but that's a
different question.


        "tsp<-" <-function(x, value)
        {if (is.null(value))
           {attr(x, "tsp") <- value
            if(inherits(x,"ts")) class(x) <- NULL
         attr(x, "tsp") <-  value
         class(x) <- "ts"

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