what is difference between (. ne chg) and (chg ne .)?

[yogita_patel]

Hello, I was wondering what is difference between (. ne chg) and (chg ne .). as i am getting different results while i use this condition vise versa.

[ballardw]

You would have to provide example data and exact complete code to determine why you get different results.

Possibly including the LOG where you get the different results.

The most likely cause I would think of is incorrect use of "ne ." with a character variable.

The MISSING function is there for a reason: Not missing(chg) would be a better approach and doesn't care if the variable CHG is character or numeric.

[Rick_SAS]

There should be no difference between those two logical expressions, so the issue must be related to either data or the way that you are using the expressions.

Here is an example of using each of the two expressions. You can see that they give the same logical result (0 or 1) for the inputs in this example:

data Have;
input chg @@;
MissFist   = (. ne chg);
MissSecond = (chg ne .);
datalines;
-1 0 . 1 2 .A 
;

proc print; run;

Please post your example where you claim to obtain different results.

[yabwon]

No data, no answer. 

Without data... just an opinion. My opinion is: in SAS these are equivalent logical conditions which results the same.

Bart