data xuexichengji;
input shuxue yuwen yingyu
total=shuxue+yuwen+yingyu;
label total="zongfeng";
cards;
1 56 67 67
2 76 67 58
3 79 87 67
;
proc sort data=xuexichengji;
by descending total;
run;
proc print data=xuexichengji;
var _numeric_;
run;
输出的结果如下,没有实现total=shuxue+yuwen+yingyu;这一步。为什么?



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