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st: Simple question about sorted datasets


From   Mark Schaffer <M.E.Schaffer@hw.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   st: Simple question about sorted datasets
Date   Thu, 30 Sep 2004 21:43:14 +0100 (BST)

At least, it looks like a simple question, but I can't find the answer.

I want a program to be able to find out if the dataset in memory is 
sorted.  If possible, I also want it to be able to find out what the sort 
variables are.  But I don't want the dataset to get sorted in the process.

-tsset- saves the panel and time variables in macros, but it will 
automatically resort the data.  (This is documented.  -tsreport- will also 
automatically resort the data, but this isn't mentioned in the manual or 
the online help.)

-desc- reports the sort variables on screen, at the end of the report.  
Curiously, it will save them in a macro only when describing a dataset in 
a file, e.g., -desc using filename-.  It will not save the sort variables 
in a macro when describing a dataset in memory.

I suspect this is an easy one and I've missed something, but it isn't for 
lack of trying - I tried the manuals and the other usual places.  I don't 
want to resort to something hacky, like -capture-ing a command that 
requires the data to be sorted and seeing if an error code is returned.

Can someone help?

Cheers,
Mark

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