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From: Regi on 15 Jul 2010 03:41
Team,

I have gone through other posts on the same subject but not able solve
my problem. My requirement is to create lagged variables by group
(city). I need to take lags by upto 4 periods. Can you please provide
your suggestion?

My data looks like below.

DATA sur;
INPUT city order deal;
DATALINES;
11 1600 0.000
11 1601 0.000
11 1602 0.000
11 1603 95.607
11 1604 75.489
11 1605 64.283
14 1600 0.000
14 1601 0.000
14 1602 0.000
14 1603 110.626
14 1604 88.163
14 1605 75.075
;

Requirement is as below.

city order deal deal1 deal2 deal3 deal4
11 1600 0.000 . .
11 1601 0.000 0.000 .
11 1602 0.000 0.000 0.000
11 1603 95.607 0.000 0.000
11 1604 75.489 95.607 0.000
11 1605 64.283 75.489 95.607
14 1600 0.000 . .
14 1601 0.000 0.000 .
14 1602 0.000 0.000 0.000
14 1603 110.626 0.000 0.000
14 1604 88.163 110.626 0.000
14 1605 75.075 88.163 110.626
14 1606 0.000 75.075 88.163

From: RolandRB on 15 Jul 2010 06:12
On Jul 15, 9:41 am, Regi <reg...(a)gmail.com> wrote:
> Team,
>
> I have gone through other posts on the same subject but not able solve
> my problem. My requirement is to create lagged variables by group
> (city). I need to take lags by upto 4 periods. Can you please provide
> your suggestion?
>
> My data looks like below.
>
> DATA sur;
>    INPUT  city   order  deal;
>    DATALINES;
>    11    1600       0.000
>    11    1601       0.000
>    11    1602       0.000
>    11    1603      95.607
>    11    1604      75.489
>    11    1605      64.283
>    14    1600       0.000
>    14    1601       0.000
>    14    1602       0.000
>    14    1603     110.626
>    14    1604      88.163
>    14    1605      75.075
>    ;
>
> Requirement is as below.
>
>   city  order    deal     deal1 deal2    deal3  deal4
>    11    1600       0.000        .            .
>    11    1601       0.000       0.000         .
>    11    1602       0.000       0.000        0.000
>    11    1603      95.607       0.000        0.000
>    11    1604      75.489      95.607        0.000
>    11    1605      64.283      75.489       95.607
>    14    1600       0.000        .            .
>    14    1601       0.000       0.000         .
>    14    1602       0.000       0.000        0.000
>    14    1603     110.626       0.000        0.000
>    14    1604      88.163     110.626        0.000
>    14    1605      75.075      88.163      110.626
>    14    1606       0.000      75.075       88.163

It tells you how to do this on the sas support site here:
http://support.sas.com/documentation/cdl/en/lrdict/63026/HTML/default/viewer.htm#/documentation/cdl/en/lrdict/63026/HTML/default/a000212547.htm

This is something like what you need but it is not clear how many
previous deals you want to keep.

data sur2;
set sur;
by city;
array x{*} deal1-deal3;
deal1=lag1(deal);
deal2=lag2(deal);
deal3=lag3(deal);
if first.city then count=1;
do i=count to dim(x);
x(i)=.;
end;
count+1;
drop count i;
run;

proc print data=sur2;
run;
From: Regi on 17 Jul 2010 13:27
Thanks Roland for the solution and link. I could proceed with this
help.

Thanks, Regi
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