Date: Fri, 10 Dec 2010 15:05:28 -0500
Reply-To: Arthur Tabachneck <art297@ROGERS.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Arthur Tabachneck <art297@ROGERS.COM>
Subject: Re: Potential DOW-Loop Problem?
Gerhard,
According to my notes you've contributed at least one percent of the SAS-L
monthly posts for 77 months. Surely, during that time, you must have
confronted a post proposing the use of a DO-Whitlock loop! No?
Art
-------
On Fri, 10 Dec 2010 14:04:39 -0500, Gerhard Hellriegel
<gerhard.hellriegel@T-ONLINE.DE> wrote:
>I'm missing the "example code"! You should at least TRY to do your
>homework yourself before you ask for help. If there is some code, there
>would be someone for sure to help you finding some mistakes.
>
>By the way: what is a DOW-loop? A Day-Of-Week loop? A Dust-Or-Water loop?
>Don't know what that is...
>
>And note, that in SAS most of the loop constructs are automatic. You don't
>need a loop for stepping through sashelp.class.
>
>data a;
> set sashelp.class;
>run;
>
>is enough.
>
>Gerhard
>
>
>
>
>On Fri, 10 Dec 2010 18:57:54 +0100, Dominik Becker
><dombecksoz@GOOGLEMAIL.COM> wrote:
>
>>Dear all,
>>
>>I am quite new to SAS' looping facilities, so I'd be glad if someone
>>could help me out. Web research suggested that it could be related to
>>a DOW-Loop, but I'm neither sure about this nor able to implement this
>>on my own.
>>
>>I have data that indicate whether a country was an autocracy (demo=0)
>>or a democracy (demo=1) in a certain year. Now three things can happen
>>over time: An autocracy can become a democracy, both autocracies and
>>democracies can remain stable, and democracies may break down.
>>My aim is to compute a 'censor' variable that takes 1 if a former
>>democracy breaks down, 0 for both stable democracies and democratized
>>countries (i.e. the censored ones), and missing for stable
>>autocracies.
>>
>>In a second step, I would have to specify in a variable 'duration' how
>>long each democracy persists.
>>
>>Below I attach some illustrative code. The last two columns is what I
>>would like to achieve. Thanks a lot for any suggestions!
>>
>>Best,
>>Dominik
>>
>>
>>*** EXAMPLE CODE ***;
>>
>>country year demo censor duration
>>1 1 0 0 3
>>1 2 0 0 3
>>1 3 1 0 3
>>1 4 1 0 3
>>1 5 1 0 3
>>2 1 1 0 5
>>2 2 1 0 5
>>2 3 1 0 5
>>2 4 1 0 5
>>2 5 1 0 5
>>3 1 0 . .
>>3 2 0 . .
>>3 3 0 . .
>>3 4 0 . .
>>3 5 0 . .
>>4 1 1 1 2
>>4 2 1 1 2
>>4 3 0 1 2
>>4 4 0 1 2
>>4 5 0 1 2
| 
