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maidenhan 发表于 2012-2-11 20:17 U can use macro to realize it. %macro choice(state);
blliufan 发表于 2012-2-12 17:28 thank you but what I want is to identify the least state value, then compare it with 2 to decid ...
zhangzachary 发表于 2012-2-13 10:36 用proc sort 对state 排序一下,然后对第一条观测值,即最小的state 用call symput 放入宏变量,再按maid ...