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conditional loop

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Frequent Contributor
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Accepted Solution

conditional loop

Hi,

i want sum of first 5 obs(1-5) then sum of next five obs(2-6) and so on...

data have;

input obs var1;

cards;

1 11

2 12

3 13

4 14

5 15

6 16

7 17

8 18

9 19

10 20

run;

Thanks..


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‎06-11-2015 08:05 AM
Super User
Posts: 9,681

Re: conditional loop

You didn't post the output you need yet .

Code: Program

data have;
input obs var1;
cards;
1 11
2 12
3 13
4 14
5 15
6 16
7 17
8 18
9 19
10 20
;
run;
proc sql;
create table want as
  select *,(select sum(var1) from have where obs between a.obs and a.obs+4) as sum
   from have as a;
quit;

Xia Keshan

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All Replies
Trusted Advisor
Posts: 1,613

Re: conditional loop

data have;

input obs var1;

lag1=lag(var1);

lag2=lag2(var1);

lag3=lag3(var1);

lag4=lag4(var1);

sum_of_five=sum(var1,lag1,lag2,lag3,lag4);

cards;

1 11

2 12

3 13

4 14

5 15

6 16

7 17

8 18

9 19

10 20

run;

Super User
Posts: 5,082

Re: conditional loop

Just to add a little variety:

sum_of_five + var1;

back5 = lag5(var1);

if back5 > . then sum_of_five = sum_of_five - back5;

Solution
‎06-11-2015 08:05 AM
Super User
Posts: 9,681

Re: conditional loop

You didn't post the output you need yet .

Code: Program

data have;
input obs var1;
cards;
1 11
2 12
3 13
4 14
5 15
6 16
7 17
8 18
9 19
10 20
;
run;
proc sql;
create table want as
  select *,(select sum(var1) from have where obs between a.obs and a.obs+4) as sum
   from have as a;
quit;

Xia Keshan

Trusted Advisor
Posts: 1,613

Re: conditional loop

Those are great ideas and certainly would be much less coding (especially if someone wanted the running average of 10 or 20 data points). Thanks!

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