COUNT MISSING AND NON MISSING ACROSS COLUMNS

[Ankur32]

Hello,

I wan to write a program to count missing and non missing values across the columns. I got a program from someone like this-

data temp;
input x y z a b$;
cards;
1 23 24 50 AA
1 . 24 50 AC
1 13 . 50 AB
1 23 . 50 .
;
run;

proc contents data=temp out=cols noprint;
run;

data _null_;
set cols nobs=total;
call symputx('totvar', total);
run;

data outdata;
set temp;
totalvar=&totvar;
totmiss=cmiss(of x--b);
totnonmiss=totalvar- cmiss(of x--b);
proc print ;
run;

and I got the correct result.

x	y	z	a	b	totalvar	totmiss	totnmiss
1	23	24	50	AB	5	1	4
1	.	24	50	AC	5	0	5
1	13	.	50	AB	5	1	4
1	23	.	50		5	2	3

But in the above program, there are 4 observations, and NOBS is used to calculate the number of observations, so how can we calculate number of variables. I mean when we use "set cols nobs=total;" the value of total should be 4 and the value of &totvar should also be 4, but in output it is showing 5. How? I am confused. I am not able to understand this. Please help me.

[Kurt_Bremser]

The answer is here:

proc contents data=temp out=cols noprint;
run;

data _null_;
set cols nobs=total;
call symputx('totvar', total);
run;

The output dataset of proc contents (cols) contains one observation for each variable in the input dataset (temp).

So when that is read in the next data step, the nobs comes from cols (not from temp!) and therefore is equivalent to the count of variables in temp.

[Ankur32]

Thank you so much..!!

[Ksharp]

data temp;
input x y z a b$;
cards;
1 23 24 50 AA
1 . 24 50 AC
1 13 . 50 AB
1 23 . 50 .
;
run;

%let dsid=%sysfunc(open(temp));
%let totvar=%sysfunc(attrn(&dsid,nvar));
%let dsid=%sysfunc(close(&dsid));

%put &totvar;