topic Group by in sas Data step in SAS Programming

Group by in sas Data step

Ankita — Thu, 22 Sep 2016 18:38:02 GMT

Hi,

Below is a data set, I need to find the identifier, its count and payout greater than 45

identiferpayoutregion

1	10	1
2	20	2
3	10	1
4	20	3
5	10	1
6	20	2
7	10	3
8	20	3
9	10	2
10	20	4
11	10	4
12	20	2

I want output like:

regioncount identifiersum payout

2 4 70

3 3 50

How to group by in data step with aggregate functions using first. and last.

Thanks and Regards,

Ankita

Re: Group by in sas Data step

Reeza — Thu, 22 Sep 2016 18:53:38 GMT

Can you please post what you've tried. You're correct in needing first/last and BY group processing but it sounds like a homework assignment and hopefully you've attempted it.

Logic.

If first of group then

set sum to first value

if last of group

increment running total

check if total is over 45

if over 45 output

if not first or last

add to total (running total).

Re: Group by in sas Data step

PGStats — Fri, 23 Sep 2016 01:38:12 GMT

Even simple things can be done in many different ways. My favourite when dealing with BY groups, with FIRST and LAST conditions available, is FIRST - All - LAST.

FIRST - All - LAST logic :

If first of group then
set initialize sum to 0
add to sum (running sum)
if last of group and sum is over 45
output

Re: Group by in sas Data step

Ksharp — Fri, 23 Sep 2016 02:17:24 GMT


data have;
infile cards expandtabs truncover;
input obs a b ;
cards;
1	10	1
2	20	2
3	10	1
4	20	3
5	10	1
6	20	2
7	10	3
8	20	3
9	10	2
10	20	4
11	10	4
12	20	2
;
run;

proc sql;
create table want as 
 select b,count(*) as count,sum(a) as sum 
  from have 
   group by b 
    having calculated sum gt 45 ;
quit;