topic Array - Please Help in SAS Programming

Array - Please Help

aidant01 — Mon, 26 Feb 2024 19:43:02 GMT

Hi,

I currently have table with vaccination date for each type of vaccination administered to a patient, where each row is a patient. A_date1 is the vaccination date of the first dose of vaccine A. I want a table with three additional columns totaling the doses given for each vaccination (a_total, b_total,c_total). There are a total of 9 vaccinations with a vaccination having up to 5 doses.

I had tried:

Array Raw {*} item1-item9; Array Key {9} $ _temporary_

(‘A’ ‘B’ ‘C’ ‘D’ ‘E’ 'F' 'G' 'H' 'I'); Array Score {9} ;

Do i = 1 to 9;
if raw{i} eq key{i} then total{i}=1; else total{i}=0;

End;
TotalCorrect = sum( of total1 – total9 );

I have:

a_date1

a_date2

a_date3

b_date1

b_date2

b_date3

b_date4

b_date5

c_date1

c_date2

c_date3

c_date4

c_date5

1/2/01

2/10/01

2/1/01

4/2/01

7/15/01

8/1/01

10/1/01

1/1/2001

2/1/2001

4/20/01

8/22/01

9/15/01

I want:

a_date1

a_date2

a_date3

b_date1

b_date2

b_date3

b_date4

b_date5

c_date1

c_date2

c_date3

c_date4

c_date5

a_total

b_total

c_total

1/2/01

2/10/01

2/1/01

4/2/01

7/15/01

8/1/01

10/1/01

1/1/2001

2/1/2001

4/20/01

8/22/01

9/15/01

Re: Array - Please Help

PaigeMiller — Mon, 26 Feb 2024 20:19:29 GMT

data want;
     set have;
     a_total=n(of a_:);
     b_total=n(of b_:);
/* I'm lazy, you type the c_total formula */
run;

No arrays needed. Assumes the values of a_date1 and the rest of the dates are numeric.

Hint: better to describe the problem and leave out of the description that you want to use a specific tool in SAS (in this case, arrays).

Re: Array - Please Help

Reeza — Mon, 26 Feb 2024 20:17:10 GMT

Do you have naming conventions as shown in your post?

The counts are based on the number of dates filled in, eg. 2 is count of a_date1 and a_date2?

Are your variables SAS dates (numeric with a date format) or character?

Re: Array - Please Help

aidant01 — Mon, 26 Feb 2024 20:19:51 GMT

Yes, counts are based on the number of dates filled in. And the variables are SAS dates.

Re: Array - Please Help

PaigeMiller — Mon, 26 Feb 2024 20:24:50 GMT

@aidant01 wrote:
Yes, counts are based on the number of dates filled in. And the variables are SAS dates.

Hello, @aidant01 please clarify. I assume the above means that the date variables are numeric, but you didn't actually say that, so I would like clarification.

Re: Array - Please Help

aidant01 — Mon, 26 Feb 2024 20:48:00 GMT

Yes, the date variables are numeric in SAS date format. a_count, b_count, c_count would be numeric integers.

Re: Array - Please Help

Reeza — Mon, 26 Feb 2024 22:15:02 GMT

Paige's solution will work then, as long as you have some sort of naming conventions with prefixes.