topic Re: Subset Data Based on Drug Name Using the Find Function in SAS Programming

Subset Data Based on Drug Name Using the Find Function

mglogan — Tue, 23 Jan 2018 19:57:58 GMT

Hello!

I am relatively new to SAS.

Task: I need to subset my data based on "drug name," since I am studying a particular class. To accomplish this, I need to search the names and export all observations to a new data set.

I am able to use the find function to subset the data using the following code:

data new;
set input;
if find(drug,'Fluoxetine','i') ge 1;
run;
proc print data=new
run;

data new1;
set input;
if find(drug,'Sertraline','i') ge 1;
run;
proc print data=new1;
run;

However, I would need to do this for each drug name and then merge the data sets based on subject ID.

What method would you suggest to efficiently accomplish this?

Thanks for your help!

Re: Subset Data Based on Drug Name Using the Find Function

Reeza — Tue, 23 Jan 2018 20:01:48 GMT

Rather than multiple data pulls, do it all in one pull using a temporary array. Assuming you have 5 drugs you're searching for something like the following may work (untested, I suspect my array definition is incorrect, you may need a _character_ to specify it's a character array).

data want;

set input;

array _drugs(5) _temporary_ ('Fluoxetine', 'Sertaline', 'random1', 'random2', 'random3');

flag=0;
do i=1 to dim(_drugs);

if find(drug, _drugs(i), 'i') > 0 then do;
flag=1;
leave;
end;

end;

if flag=1 then output; *keeps only records of interest;

run;

Re: Subset Data Based on Drug Name Using the Find Function

ChrisNZ — Tue, 23 Jan 2018 20:30:13 GMT

Do you need new datasets?

How about this?


 proc print data=input; 
  where find(drug,'Sertraline','i') ; 
run;

Re: Subset Data Based on Drug Name Using the Find Function

mglogan — Wed, 24 Jan 2018 02:12:24 GMT

Thank you! This worked with few adjustments.