topic Re: how to create group wise sequence number and subgroup wise sequence number in SAS Programming

how to create group wise sequence number and subgroup wise sequence number

thanikondharish — Sun, 26 Feb 2023 04:23:57 GMT

data rawdata ;
input subject date:date9. ;
format date date9. ;
cards;
101 01jan2023
101 01jan2023
101 02jan2023
101 03jan2023
101 03jan2023
101 03jan2023
run;

I have one dataset main group variable is subject and subgroup variable is date . Now how to create group wise sequence number and subgroup wise sequence number in datastep block as well as in proc sql .
Output should be like below:
for example:

subject date grp_seq_num sub_grp_seq_num
101 01jan2023 1 1
101 01jan2023 1 2
101 02jan2023 1 1
101 03jan2023 1 1
101 03jan2023 1 2
101 03jan2023 1 3

102 05jan2023 2 1

102 05jan2023 2 2

102 06jan2023 2 1

Re: how to create group wise sequence number and subgroup wise sequence number

Patrick — Sun, 26 Feb 2023 06:27:51 GMT

"... in datastep block as well as in proc sql"

Why are you asking for explicit and multiple coding approaches? If this is some sort of exercise then I suggest you first put in some own work and then share eventually not yet working code and ask questions based on what you already worked out and what's still missing.

Re: how to create group wise sequence number and subgroup wise sequence number

Kurt_Bremser — Sun, 26 Feb 2023 07:39:33 GMT

In a data step, it's a breeze. Forget SQL, SQL is not good for sequential operations.

Use a DATA step with BY subject date;

RETAIN both new variables.

At first.subject, increment grp_seq_num.

At first.date, set sub_grp_seq_num to 1, otherwise increment it.

Use Sum Statements to increment.