data study.develop_final4;
set study. Develop_final3;
if _n_=1 then set study.develop_final3_miss_mean;
array numvar(*) flt2_num_var_miss_1- flt2_num_var_miss_5;
array meanvar(*) miss_mean_1-miss_mean_5;
array miss(*) miss_1-miss_5;
do i=1 to dim(numvar);
miss(i)=(numvar(i)=.);
if numvar(i)=. Then numvar(i)=meanvar(i);
end;
drop i miss_mean_1-miss_mean_5;
run;
请问miss(i)=(numvar(i)=.);该如何理解？