Date:         Wed, 11 Feb 2009 14:53:42 +1100
Reply-To:     Gary Oliver <G.Oliver@econ.usyd.edu.au>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Gary Oliver <G.Oliver@econ.usyd.edu.au>
Subject:      SPSS v16 not v17 university upgrade
In-Reply-To:  A<499197D4.9010801@DrKendall.org>
Content-Type: multipart/alternative;

Hi All and SPSS
 
Here at University of Sydney, I have just received a message saying we
are being upgraded from v15 to v16. Please can anyone explain to me why
if v17 is out SPSS would not be providing codes for the less troublesome
v17? Public info to the list or private information to my e-mail would
be gratefully received
 
Warm regards/gary
 
________________________________

From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
Art Kendall
Sent: Wednesday, February 11, 2009 2:06 AM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: Re: help using lag function



        see if syntax like that below is what you want.
        Note that it will be very dependent on case order.
	
	
	
        data list list/ID (f2) class(f1) period (f2) want (f1).
        begin data
        12 5 43 0
        12 5 44 0
        12 4 45 1
        12 4 45 0
        34 2 38 0
        34 3 39 1
        34 3 40 0
        34 4 41 1
        34 4 42 0
        end data.
        compute changed eq 0.
        do if id eq lag(id).
        compute changed = class ne lag(class).
        end if. 
        formats changed (f1).
        LIST . 
	
        Art Kendall
        Social Research Consultants
	
        David Wright wrote: 

                I need to identify the period when a change occurs in
the status of a 
                respondent. Listed below is a sample data file 
        	
                v1 = class (1 thru 6) 
                v2 = period (1 thru 72) 
        	
                ID v1 v2 
                12 5 43 
                12 5 44 
                12 4 45 
                12 4 45 
                34 2 38 
                34 3 39 
                34 3 40 
                34 4 41 
                34 4 42 
        	
                I'd like to create a flag to show when a change occurred
from the 
                previous record-- v3. 
                ID v1 v2 v3 
                12 5 43 0 
                12 5 44 0 
                12 4 45 1 
                12 4 45 0 
                34 2 38 0 
                34 3 39 1 
                34 3 40 0 
                34 4 41 1 
                34 4 42 0 
        	
                Thanks, 
        	
                David 
        	
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