Date: Thu, 2 Mar 2000 19:29:59 "GMT" "David L. Ward" "SAS(r) Discussion" "David L. Ward" Re: Fundamental Question To: Mo Uddin-M text/plain; charset="us-ascii"

You need to specify which variables you want to keep in data sets a and b. Add keep statements to the data step: >data a (keep=i x y) b (keep=i x z); > set k; > if i in (2, 4, 6) then do; > y=x; > output a; > end; > else if i in (9, 10) then do; > z=x; > output b; > end; >proc print data=a; >proc print data=b; >run;

HTH David Ward SASHelp.com

-----Original Message----- From: Mo Uddin-M <uddin.m@PG.COM> Sent: 3/2/00 7:16:59 PM Subject: Fundamental Question

> Hi Folks, > >I have a very fundamental question. If I run the following code: >data k; > do i=1 to 10; > x=ranuni(100); > output; > end; > >data a b; > set k; > if i in (2, 4, 6) then do; > y=x; > output a; > end; > else if i in (9, 10) then do; > z=x; > output b; > end; >proc print data=a; >proc print data=b; >run; > >I get these two sets for data a & b; > > OBS I X Y Z > > 1 2 0.00887 0.00887 . > 2 4 0.93986 0.93986 . > 3 6 0.92773 0.92773 . > > > OBS I X Y Z > > 1 9 0.97940 . 0.97940 > 2 10 0.65666 . 0.65666 > >My question is why variable Z in data a and Y in data b. >I would appreciate an explanation for this. > >Thanks in advance. > >Mohammad >

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