Date:         Sun, 10 May 2009 20:25:22 -0400
Reply-To:     Wensui Liu <liuwensui@GMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Wensui Liu <liuwensui@GMAIL.COM>
Subject:      keep value from previous iteration
Content-Type: text/plain; charset=ISO-8859-1

Dear All,
I know it is relatively simple but just can't find an elegant and
simple solution with retain statement.
here is what I have.
1
2
3
4
here is what i want
1
2 1
3 2
4 3

I don't want to use lag() function or hash and just want to know a way
in datastep with retain.
thank you so much!
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WenSui Liu
Acquisition Risk, Chase
Blog   : statcompute.spaces.live.com

Tough Times Never Last. But Tough People Do.  - Robert Schuller
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