Hi
I have 1 variabel A. I need to create a new variabel B thats i created through the retain function. For the first observation must B must be equal to 1.
For all the other values B=1-B*A - where B is the retained result.
As an example:
Data have:
A:
0,5
0,5
0,5
Data want
A: B
0,5 1
0,5 0,5 (calculated as: 1-1*0,5)
0,5 0,75 (calculated as: 1-0,5*0,5)
Best regards
data want;
set have;
retain b 1;
if _n_ > 1 then b= 1- b*a;
run;
DATA A10Aug2015_1;
retain B 1;
INPUT A;
OUTPUT;
B=1-B*A;
DATALINES;
0.5
0.5
0.5
;
I am not clear on what the dataset A is for, it doesn't add anything to the mix. Adjust the do loop for number of iterations:
data want (drop=i);
retain b 1;
do i=1 to 5;
b=1 - (b * 0.5);
output;
end;
run;
It's finally time to hack! Remember to visit the SAS Hacker's Hub regularly for news and updates.
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.
Ready to level-up your skills? Choose your own adventure.