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st: RE: Sorting huge Datasets
-sort- doesn't sort if the observations
are already sorted according to the order
> are there any commands which change the actual sort sequence
> of a dataset?
> We got the problem of having some big datasets that must to
> be sorted every time by the same variables before executing
> commands on them. It takes up a lot of time to sort them, so
> we got two questions.
> First, are there certain commands that change the sort
> sequence and others who keep it? And second, is there any
> command (e.g. assert) in order to check the sort sequence and
> only in case of being unsorted sorts the data?
> ps: what is the intern value of a missing?
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