Anyone can explain why x3=0? I thought x3 returns the number of missing values of {1, 0, ., 2, 5, ., 1, 0} (combine numbers for x1 and numbers for x2), so x3 should be 2, but it's 0. I get confused this.
data one;
x1=nmiss(1, 0, ., 2, 5, .);
x2=nmiss(1, 0);
x3=nmiss(of x1-x2);
put x1= x2= x3=;
run;
Yes, you are right. I made a stupid error. I thought x1 and x2 are those numbers in the above, but actually they are returned values. Thanks.
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