摘要: data a;set sashelp.class;keep name sex age;rename name=nam;proc print; data b;set sashelp.class;retain max_age 0;if age>max_age then max_age=age;proc 阅读全文
posted @ 2021-04-09 10:42 AnXiaoni 阅读(56) 评论(0) 推荐(0)