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Date:         Wed, 13 May 2009 08:46:04 -0700
Reply-To:     "Choate, Paul@DDS" <pchoate@DDS.CA.GOV>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Choate, Paul@DDS" <pchoate@DDS.CA.GOV>
Subject:      Re: what is wrong with my code for %length of a data set
In-Reply-To:  A<>
Content-Type: text/plain; charset="us-ascii"

Interesting - an OUTPUT statement *before* a SET statement referring to an empty dataset will produce a record of missing values from an empty dataset.

data nada; set sashelp.class; if "F"<sex<"M" then output; run;

data zerolines; set nada; run;

data zerolines2; set nada; output; run;

data oneline; output; set nada; run;

Paul Choate DDS Data Extraction (916) 654-2160 -----Original Message----- From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of Sent: Wednesday, May 13, 2009 8:04 AM To: SAS-L@LISTSERV.UGA.EDU Subject: what is wrong with my code for %length of a data set

dear all:

i am trying to output ONE record from a 0 obseration data set. but the macro is not working, can you please help ? thks.

Jingtailan ============================

data three; set postz; by subjid labcat ltstcod d_vwin _trt; if last.subjid; d_vwin=9999; run;

%macro try;

data post1; set one two %if %length(three) %then %do; flp; %end; %else %do; output; vwin=9999; output; %end; run; %mend;

%try ;

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