topic Re: Change the arguments for IN based on the current value within macro in SAS Programming

Change the arguments for IN based on the current value within macro

KoenN — Fri, 30 Jan 2015 17:07:30 GMT

I use the following macro to count certain events within observations. The data structure is:

Index_date

Event_1_type

Event_1_date

Event_1_drug

Event_4_type

Event_4_date

Event_4_drug

ep denotes certain (combined) endpoints: A, B and C.

End point A corresponds to event type 1

End point B corresondes to event type 2 and 3

End point C corresponds to event type 1,2, 3 and 4.

%macro count1(all_eps);

%let k=1;

%let ep = %scan(&all_eps, &k);

%do %while("&ep" NE "");

*/ I assume I have to put some code here to get it working */

EP_&ep._nr = 0;

EP_&ep._ondrug =0;

EP_&ep._offdrug = 0;

%do i=4 %to 1 %by -1;

If Event_&i._type IN(&eventtype.) then

do;

EP_&ep._nr = EP_&ep._nr+1;

if Event_&i._drug = 1 then

do;

EP_&ep._ondrug = EP_&ep._ondrug +1;

end;

Else

do;

EP_&ep._offdrug = EP_&ep._offdrug +1;

end;

If (EP_&ep._ondrug+EP_&ep._offdrug) ne EP_&ep._nr then

do;

Put 'WARNING: missing drug use information'/ ID=//;

end;

%let k = %eval(&k + 1);

%let ep = %scan(&all_eps, &k);

%end;

%mend count1;

%count1(A B C);

run;

What I can't seem to get working is to let '&eventtype.' that is used as the arguments for the IN expression be either '1', '2,3' or ; '1,2,3,4; ; pending on the current value of ep. It has to be something like, but I can't get in working within the macro;

If ep = A then do;

eventtype = 1

end;

else if ep = B then do;

eventtype = %str(2,3);

end;

else if ep = C then do;

eventtype = %str(1,2,3,4);

end;

Thank you for your help!

Re: Change the arguments for IN based on the current value within macro

LinusH — Fri, 30 Jan 2015 17:47:57 GMT

Limit your scenario to minimum together with the MLOGIC SYMBOLGEN MPRINT options.

Re: Change the arguments for IN based on the current value within macro

KoenN — Fri, 30 Jan 2015 17:52:59 GMT

I'm sorry, I don't quite understand. Why do you want me to run with these options? Do you mean as a debug technique? Or do you want to see the logs with these options?

Re: Change the arguments for IN based on the current value within macro

ballardw — Fri, 30 Jan 2015 18:04:24 GMT

If this is used as part of a datastep I'd look very closely if I need some of this macro coding.

The loop with seems to be very tied to some fixed variables Event_1_type,Event_2_type,Event_3_type and Event_4_type which makes me think that loop is a likely candidate for an array process.

Is your data structure actually a single column (variable) with those types of values or are those just the variable names?

Can you provide a few rows of data, a description of what your are attempting and an example of what the output for those rows of data would look like.

It is very hard to make much suggestion regarding &eventtype as you don't show where it is assigned or created.

Re: Change the arguments for IN based on the current value within macro

KoenN — Fri, 30 Jan 2015 18:38:31 GMT

Thanks.

What actually happens in each of the 4 do loops is a bit more elaborate than the sample I provided (but that works). Below a few rows of data (limited to Event_3 and Endpoint B, for brevity)

OBS	Event_1_type	Event_1_drug	Event_2_type	Event_2_drug	Event_3_type	Event_3_drug
1	2	.	.	.	.	.
2	2	0	1	1	1	0
3	3	0	2	0	3	0
4	4	0	.	.	.	.
5	1	0	.	.	.	.

What I want is:

OBS	Event_1_type	Event_1_drug	Event_2_type	Event_2_drug	Event_3_type	Event_3_drug	EP_A	EP_A_ondrug	EP_A_offdrug	EP_B	EP_B_ondrug	EP_B_offdrug
1	2	0	.	.	.	.	0	0	0	1	0	1
2	1	0	1	1	1	0	3	1	2	0	0	0
3	3	0	2	0	3	0	0	0	0	3	0	0
4	4	0	.	.	.	.	0	0	0	0	0	0
5	1	0	3	0	.	.	1	0	1	1	0	0

The first event for case 1 was 'type 2', which is part of endpoint B. It was not while using the drug; so EP_B_offdrug = 1 and EP_B_ondrug = 0.

Case 2 had 3 events, all from 'type 1'. Type 1 is part of endpoint A. The second one was while using the drug, the other two not, hence EP_A_ondrug = 1 and EP_A_offdrug = 2

Case 4 had a type 4 event, which is not part of endpoint A or B, hence the zero's.

It is very hard to make much suggestion regarding &eventtype as you don't show where it is assigned or created.

Sorry about that. I've removed the syntax in which I tried to assign it, since it didn't work. You can see my comment on where it was. I want to link a certain endpoint with a string(?) of numbers to be put in as arguments for the IN in line If Event_&i._type IN(&eventtype.) then.

To put it differently, I want this (very much shortened, there are more endpoints and more eventtypes) to happen:

while ep =	eventtype =	submitted code
A	1	... If Event_&i._type IN(1) then ....
B	2,3	... If Event_&i._type IN(2,3) then ...
C	1,2,3,4	... If Event_&i._type IN(1,2,3,4) then ...

Where the value of the eventtype macro variable are used to see if Event_&i._type corresponds to the event types I'm looking for.

Re: Change the arguments for IN based on the current value within macro

KoenN — Fri, 30 Jan 2015 20:17:58 GMT

I've found it myself. I've added the code

%if %sysevalf(&ep = A) %then

%do;

%let eventtype = 1;

%end;

%ELSE %if %sysevalf(&ep = B) %then

%do;

%let eventtype = %str(2,3);

%end;

%ELSE %if %sysevalf(&ep = C) %then

%do;

%let eventtype = %str(1,2,3,4);

%end;