Hello everyone,
Thanks in advance for your help!
I have a data like this:
X1 X2 X3 ...
1 ... ...
1 ... ...
2 ... ...
2 ... ...
2 ... ...
3 ... ...
4 ... ...
4 ... ...
and I want to create a new variable (called Y) with binary values, which makes the data as such:
X1 X2 X3 ... Y
1 ... ... 0
1 ... ... 1
2 ... ... 0
2 ... ... 1
2 ... ... 1
3 ... ... 0
4 ... ... 0
4 ... ... 1
In other words, it puts 0 for a unique value of X1, 0 for the first non-unique value, and 1 for the remainder of non-unique values. I was wondering how it can be done in SAS. Any idea/help is really appreciated!
Assuming data is sorted by X1 then do:
data want;
set have;
by X1;
if first.x1 then y=0; else y=1;
run;
Assuming data is sorted by X1 then do:
data want;
set have;
by X1;
if first.x1 then y=0; else y=1;
run;
Similar method, slightly different calculation, since that's exactly what FIRST does, flip the indicator.
data want;
set have;
by X1;
y=1-first.x1;
run;
Don't miss out on SAS Innovate - Register now for the FREE Livestream!
Can't make it to Vegas? No problem! Watch our general sessions LIVE or on-demand starting April 17th. Hear from SAS execs, best-selling author Adam Grant, Hot Ones host Sean Evans, top tech journalist Kara Swisher, AI expert Cassie Kozyrkov, and the mind-blowing dance crew iLuminate! Plus, get access to over 20 breakout sessions.
What’s the difference between SAS Enterprise Guide and SAS Studio? How are they similar? Just ask SAS’ Danny Modlin.
Find more tutorials on the SAS Users YouTube channel.