Paul Gilbert pgilbert@bank-banque-canada.ca
Mon, 28 Sep 1998 15:30:03 -0400

If value is NULL I think tsp assignment should not return a class ts object.
Below is a fixed version.

Paul Gilbert

"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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