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Re: st: Simple question about sorted datasets


From   khigbee@stata.com
From   "Mark Schaffer <M.E.Schaffer@hw.ac.uk> asks:"@hsph.harvard.edu
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Simple question about sorted datasets
Date   Thu, 30 Sep 2004 17:05:27 -0500

> 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.

Look at -help macro-.  The extended macro function -sortedby-
will give you what you want.  For instance,

    . sysuse auto
    . local cursort : sortedby
    . di "`cursort'"

Would show you that the auto dataset is sorted on the "foreign"
variable.

Ken Higbee    khigbee@stata.com
StataCorp     1-800-STATAPC

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