num=n(of _numeric_);
n函数是求非缺失值个数，非0个数我就不知道了

Try to use NMISS function based on SAS version 9.2 :)

data have;
infile cards dsd truncover dlm=' ';
input x1-x5 ;
cards;
1 2 0  40
1  9 0 0
8  5  9
7 50 5 7 3
;
run;

data want;
  set have;
  array x _numeric_;
  n=n(of x(*));
  nmiss=nmiss(of x(*));
  nonezero_1=countw(catx(' ', of x(*)),' 0');
  nonezero_2=countw(catx(' ', of x(*)),'. 0');
  run;

nonezero_1=countw(catx(' ', of x(*)),' 0');
  nonezero_2=countw(catx(' ', of x(*)),'. 0');
这个地方能解释一下吗