麦耀嘉 2021-05-17 15:12 开发者_高级运维这个应该这么想,哑、盲、聋、都是一个极限性的词汇,一点都说不出来才叫哑,一点都听不见才叫聋,一点都看不到才叫盲,而嗅觉来讲似乎不存在这个情况,就算鼻子塞住了
I\'m pretty new to Stata. I have a set of observation开发者_运维技巧s of the form \"CountryGDPYear\". I want to create a new variable GDP1960, which gives the GDP in 1960 of each country for each yea