Sum Certain values across rows.

[mcook]

Given a table like such:

Obs    A    B    C    D    E

 1     1    2    1    1    2
 2     2    2    1    2    2
 3     2    3    3    2    2
 4     1    2    3    1    1

how do i create a  column , summing the number of times the value of 1 occurs in the row? 

Like this.

Obs    A    B    C    D    E    Count

 1     1    2    1    1    2      3  
 2     2    2    1    2    2      1  
 3     2    3    3    2    2      0  
 4     1    2    3    1    1      3  

[A_Kh]

Hi, 

If the table values are only 1 digit numbers (0-9), then a simple count function can give the answer. I would combine all variables into a character string and count number 1 there.

  data want; 
  	set have; 
	char= catx(',', a, b, c, d, e);
	count= countc(char, '1'); 
proc print; run; 

[KachiM]

You can use SAS array and examine the values of each column to match with 1, and count them.

data have;
input A B C D E;
datalines;
 1    2    1    1    2  
 2    2    1    2    2  
 2    3    3    2    2  
 1    2    3    1    1
;
run;

data want;
   set have;
   array x[*] A B C D E;
   count = 0;
   do i = 1 to dim(x);
      if x[i] = 1 then count + 1;
   end;
drop i;
run;
proc print data = want;
run;