crossbone254 发表于 2018-4-7 21:14 
那个r(100)应该是蓝色字体并对应一个链接的,你点了stata会弹出窗口显示这个错误对应的具体内容,进去看看可 ...
您好 ,链接内容是:
[P] error . . . . . . . . . . . . . . . . . . . . . . . . Return code 100
varlist required;
= exp required;
using required;
by() option required;
Certain commands require a varlist or another element of the
language. The message specifies the required item that was
missing from the command you gave. See the command's syntax
diagram. For example, merge requires using to be specified;
perhaps you meant to type append. Or, ranksum requires a
by() option; see [R] signrank.
我看的稀里糊涂的。。