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Date:         Wed, 6 Jun 2001 18:05:47 +0100
Reply-To:     John Whittington <John.W@MEDISCIENCE.CO.UK>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         John Whittington <John.W@MEDISCIENCE.CO.UK>
Subject:      Re: How to make a dataset with 0 observations?
Comments: To: Jay Weedon <jweedon@EARTHLINK.NET>
In-Reply-To:  <E157K5x-0007n9-00@relay1.netnames.net>
Content-Type: text/plain; charset="us-ascii"

At 12:02 05/06/01 -0400, Jay Weedon wrote:

>Wow, I received about 6 responses in an hour. Thanks so much! Inspired >by them, I found yet another solution: > >data new; > x=.; y=.; delete; >run;

If this has turned into a 'minimise the number of keystrokes' game, then:

1... STOP has two less characters than does DELETE, but works just as well.

2... If you don't mind the 'uninitialised' message in the log, you can make use of the fact that mention of a variable on the RIGHT hand side (as well as left hand side) of an assignment statement result in that variable being 'created', to knock off a further two keystrokes, with:

data new; x=y; stop; run ;

... and, of course, if you really wanted to become a 'messy programmer', you could miss out the RUN statement as well, provided there was some subsequent step in the program! Hence my very best ('messy') offer would be:

data new;x=y;stop;

... and I really can't see how you could reduce the number of keystrokes any further - you are always going to need a STOP (or DELETE) statement to prevent any observations being created, and you obviously must mention the two variables you want (X and Y); all that my 'best offer' has in addition that that is one equals sign, which is about as modest as you could get!

Kind Regards,

John

---------------------------------------------------------------- Dr John Whittington, Voice: +44 (0) 1296 730225 Mediscience Services Fax: +44 (0) 1296 738893 Twyford Manor, Twyford, E-mail: John.W@mediscience.co.uk Buckingham MK18 4EL, UK mediscience@compuserve.com ----------------------------------------------------------------


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