topic Re: Creating a sequence in SAS Programming

Creating a sequence

subrat1 — Thu, 16 Jun 2016 09:48:32 GMT

Year	Quarter	Quarter_id
2000	1	3
2000	2	6
2000	3	9
2000	4	12
2001	1	15
2001	2	18
2001	3	21
2001	4	24
2002	1	27
2002	2	30
2002	3	33
2002	4	36
2004	1	39
2004	2	42
2004	3	45
2004	4	48
2005	1	51
2005	2	54
2005	3	57
2005	4	60

i have year and quarter column , and i wanted to create quarter_id column , Kindly help on this in writing the code.

Re: Creating a sequence

arodriguez — Thu, 16 Jun 2016 10:07:53 GMT

Hi subtrat1,

If your data always have all quarters, the easiest way to do it is sorting your data and then using the order on that data.

proc sort data=Have;
  by year Quarter;
run;

Then you could create a sequence and multiply by 3

data want;
  set have;
  by year quarter;
  retain count 0;
  if first.quarter then count=count+1;
  Quarter_ID=count*3;
  drop count;
run;

If you don't have all quarters, I guess that the easiest way to do it is comparing from your origen

data want;
  set have;
  retain first_Year first_quarter;
  if _N_=1 then do;
    first_YEAR=Year;
    first_quarter=quarter;
  end;
  Quarter_ID=(Year-first_Year)*12+Quarter*3;
run;

Re: Creating a sequence

Astounding — Thu, 16 Jun 2016 10:10:58 GMT

Assuming your data is already in sorted order, this is probably simplest:

data want;

set have;

quarter_id + 3;

run;

Re: Creating a sequence

LinusH — Thu, 16 Jun 2016 11:29:52 GMT

To create a key, that can be repoduced anywhere, anytime, use a hash:

md5(cats(Year,'|',Quarter)