Date:         Wed, 3 Nov 2010 21:01:40 -0400
Reply-To:     bbser2009 <bbser2009@GMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         bbser2009 <bbser2009@GMAIL.COM>
Subject:      drop=
Content-Type: text/plain; charset="us-ascii"

Hi there,



Let's consider a code like this:

DATA temp (drop=month);

SET sashelp.class;

...

DO month=1 to 10;

...

END;

...

RUN ;





Since there is a data set inside, we have multiple iterations of the data
step.
I was wondering, how did the data set option drop= do in this code?



My guess is like this:

at the end of EACH data step iteration, the value of the variable month in
the PDV would not be written to the data set temp.

Is this understanding right? Thanks a lot.



Max