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Date:   Thu, 5 Feb 2004 15:59:58 GMT
Reply-To:   John Iwaniszek <not@HOTMAIL.COM>
Sender:   "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:   John Iwaniszek <not@HOTMAIL.COM>
Subject:   Re: create a new variable that indicate a change

Jesper Nyholm wrote:

> /*** > Hi > Can anybody tell me how to create a new variable that indicate a change > in amount for every id? > ***/ > DATA TEST; > INPUT ID 1-5 AMOUNT 7-11; > DATALINES; > 10001 2000 > 10001 2000 > 10001 3000 > 10002 2500 > 10002 3000 > 10003 1000 > 10003 1000 > 10003 1000 > 10003 2000 > 10003 1000 > ; >

I would direct you to the section in the SAS manual concerned with "RETAIN", and BY-processing in general.

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