求学小灵通 发表于 2018-5-10 13:02 
clear
set obs 100
gen CU = _n //*如果你有CU变量,此句可以省略
谢谢您,在运行的时候:set obs 100行不通-observation number out of range;Observation number must be between 1,016,163 and 2,147,483,619. (Observation numbers are typed without commas.)。我的样本是1016163个,请问应该如何解决?