- * Example generated by -dataex-. To install: ssc install dataex
- clear
- input long stkcd int year float ratio byte rank
- 1 2012 42.16 1
- 1 2012 7.41 2
- 1 2013 50.2 1
- 1 2013 6.38 2
- 1 2014 50.2 1
- 1 2014 6.38 2
- 1 2015 49.56 1
- 1 2015 6.11 2
- 1 2016 49.56 1
- 1 2016 6.11 2
- 1 2017 49.56 1
- 1 2017 6.11 2
- 1 2018 49.56 1
- 1 2018 6.11 2
- 2 2012 14.72 1
- 2 2012 1.27 2
- 2 2013 14.7 1
- 2 2013 1.21 2
- 2 2014 14.91 1
- 2 2014 11.91 2
- 2 2015 15.23 1
- 2 2015 11.9 2
- 2 2016 15.24 1
- 2 2016 11.91 2
- 2 2017 29.38 1
- 2 2017 11.91 2
- 2 2018 29.38 1
- 2 2018 11.91 2
- end
数据如上,想让rank =1 时的ratio 除以rank = 2时的ratio,求助大神。