SAS Tip_less code: Assigning 1 or 0 to flag variable
*Creating a flag variable when a test variable meets certain criteria is very common for SAS programmer….
Many SAS programmers use the below code to assign a flag of 1 or 0 depending on of the test variable meets criteria or not.;
*Ex:;
*Create a test dataset;
data test;
input id age sex $;
cards ;
1 25 Male
2 35 Female
3 29 Female
4 37 Male
5 32 Male
;
run ;
*Most programmers use the following code to assign avalue of 1 0r 0 to flag variable;
data test1;
set test;
if sex= 'Male' then flag=1;
else flag=0;
run ;
*Some programmers use the following code to do the same task;
data test;
set test;
flag= ifn (sex= 'Male' ,1,0);
run ;
*You can write ....even simpler code than the above 2 dataset step methods.;
data test2;
set test;
flag= 'Male' =sex;
run ;
*Or;
data test3;
set test;
flag=sex= 'Male' ;
run ;
* Note : The above code does the same thing as the 1st and 2nd method;
Cave...