黃河泉 发表于 2020-2-20 07:50 
https://bbs.pinggu.org/thread-5048204-1-1.html
* Example generated by -dataex-. To install: ssc install dataex
clear
input long id int year double(资产总计 研发投入金额) byte(year1 year2)
968 2007 3.813e+09 . . 11
968 2008 4.815e+09 . . 11
968 2009 5.218e+09 . . 11
968 2010 6.672e+09 . . 11
968 2011 7.620e+09 . . 11
968 2012 9.454e+09 . . 11
968 2013 1.171e+10 . . 11
968 2014 1.543e+10 . . 11
968 2015 1.250e+10 . . 11
968 2016 6.226e+09 . . 11
968 2017 7.353e+09 . . 11
969 2007 3.555e+09 . . 11
969 2008 4.103e+09 . . 11
969 2009 4.856e+09 28049691 7 11
969 2010 5.398e+09 . . 11
969 2011 6.922e+09 . . 11
969 2012 7.612e+09 58431500 7 11
969 2013 7.498e+09 1.377e+08 7 11
969 2014 7.733e+09 1.315e+08 7 11
969 2015 8.327e+09 72989164 7 11
969 2016 9.895e+09 1.462e+08 7 11
969 2017 1.002e+10 1.777e+08 7 11
end