即将离开知乎
您即将离开知乎,请注意您的帐号和财产安全。
https://www.statalist.org/forums/forum/general-stata-discussion/general/1291938-carryforward-data-for-a-limited-number-of-rows
您即将离开知乎,请注意您的帐号和财产安全。
https://www.statalist.org/forums/forum/general-stata-discussion/general/1291938-carryforward-data-for-a-limited-number-of-rows