Date:         Wed, 3 Oct 2007 17:45:10 -0400
Reply-To:     souga soga <souga1234@GMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         souga soga <souga1234@GMAIL.COM>
Subject:      Flagging observations
Content-Type: text/plain; charset=ISO-8859-1

Hi ,

I have a data set:
DATA test;

x=.;OUTPUT;
x=.;OUTPUT;
x=.;OUTPUT;
x=10;OUTPUT;
x=10;OUTPUT;
x=.;OUTPUT;
x=.;OUTPUT;
x=.;OUTPUT;
x=20;OUTPUT;
x=20;OUTPUT;
x=.;OUTPUT;
x=.;OUTPUT;
x=.;OUTPUT;
x=30;OUTPUT;
x=40;OUTPUT;
x=.;OUTPUT;
x=.;OUTPUT;
x=.;OUTPUT;
x=50;OUTPUT;
x=60;OUTPUT;

RUN;
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I would like to flag observations sequentially that start with the
first missing value and end with the last non-missing value.

Here is the expected output.

x=.;Flag=1;
x=.;Flag=1;
x=.;Flag=1;
x=10;Flag=1;
x=10;Flag=1;

x=.;Flag=2;
x=.;Flag=2;
x=.;Flag=2;
x=20;Flag=2;
x=20;Flag=2;
x=.;Flag=3;
x=.;Flag=3;
x=.;Flag=3;
x=30;Flag=3;
x=40;Flag=3;
x=.;Flag=4;
x=.;Flag=4;
x=.;Flag=4;
x=50;Flag=4;
x=60;Flag=4;

Thanks,

Sa

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