Mike,

That was my point. My example is the extreme case when NO variables from the input data appear in the output; but it isn't completely unlikely.

What's in the output : datastep created variables

... mark

On 8/18/2011 12:03 PM, Mike Rhoads wrote: > Even beyond Mark's example, the premise seems invalid to me. You might need a variable from the input data set as a resource, e.g. part of an expression to create a derived variable, without needing to carry it onto the output data set. > > Mike Rhoads > RhoadsM1@Westat.com > > > > -----Original Message----- > From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of Mark Miller > Sent: Thursday, August 18, 2011 2:51 PM > To: SAS-L@LISTSERV.UGA.EDU > Subject: Re: Is there a way to create variable containing the pdv? > > Art, > > Regarding the scenario described > { given a datastep, which variables are listed on the keep option of a set statement, but aren't listed on the keep option of the data statement, thus could be > removed from the keep option of the set statement. } > > What if NONE of vars on keep option of DATA > appear in keep option of SET ?? > Like where everything in output is created in datastep from vars in SET or from code ? > > ...mark > > On 8/18/2011 11:30 AM, Arthur Tabachneck wrote: >> Mark, >> >> I was thinking about how I would go about addressing a question that I >> saw on the SAS Forum, namely given a datastep, which variables are >> listed on the keep option of a set statement, but aren't listed on the >> keep option of the data statement, thus could be removed from the keep >> option of the set statement. >> >> Yes, of course I know how to use put or putlog to see a list of what >> is in the pdv, but I've never tried to grab and analyze it. >> >> Put another way, how would one incorporate the results of, say, a put >> _all_ into a variable? >> >> Thus, my question, is: without having to change one's code to >> incorporate macro variables that contain the information, can it be >> done programmatically by just analyzing one's program. >> >> Art >> ------- >> On Thu, 18 Aug 2011 11:18:15 -0700, Mark Miller<mdhmiller@GMAIL.COM> wrote: >> >>> Art, >>> >>> I already commented on the outgoing var list. >>> >>> As for the content of the current PDV, you know there are many ways >>> to get the var list as that topic gets discussed here every month. >>> >>> Suppose you create a macro var named myPDV. >>> Then you assign it to a datastep var PDVnow. >>> What do you do with it? >>> Do you want the list to include PDVnow. >>> >>> ... mark miller >>> >>> >>> On 8/18/2011 10:54 AM, Arthur Tabachneck wrote: >>>> Suppose you had the following program: >>>> >>>> data test(keep=a y z); >>>> input a b c x y; >>>> z=y+5; >>>> cards; >>>> 1 2 3 4 5 >>>> ; >>>> >>>> Is there a way, from within the datastep, to create a variable that >> contains >>>> the names of all of the variables that are in the pdv. Thus, in the >> above >>>> example, say a variable called variables that would have the value: >>>> "a b c x y z"? And, similarly, create another variable that has the >> names of >>>> the variables in the keep statement (i.e., in this case, a variable >> called >>>> kept with the value "a y z")? >>>> >>>> Thanks in advance, >>>> Art