如何求三年滚动标准差

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* Example generated by -dataex-. For more info, type help dataex
clear
input str12(Stkcd year) double Ins
"000059" "2012" .596965
"000059" "2013"  .55596
"000059" "2014" .572662
"000059" "2015" .547074
"000059" "2016" .577447
"000059" "2017" .507707
"000059" "2018" .496762
"000059" "2019" .494996
"000301" "2012" .392615
"000301" "2013" .378718
"000301" "2014" .373525
"000301" "2015" .390048
"000301" "2016" .387173
"000301" "2017" .379991
"000420" "2012" .225267
"000420" "2013" .223525
end

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关键词：标准差

* Example generated by -dataex-. For more info, type help dataex
clear
input str12(Stkcd year) double Ins
"000059" "2012" .596965
"000059" "2013"  .55596
"000059" "2014" .572662
"000059" "2015" .547074
"000059" "2016" .577447
"000059" "2017" .507707
"000059" "2018" .496762
"000059" "2019" .494996
"000301" "2012" .392615
"000301" "2013" .378718
"000301" "2014" .373525
"000301" "2015" .390048
"000301" "2016" .387173
"000301" "2017" .379991
"000420" "2012" .225267
"000420" "2013" .223525
end

1. * Example generated by -dataex-. For more info, type help dataex
   
2. clear
   
3. input str12(Stkcd year) double Ins
   
4. "000059" "2012" .596965
   
5. "000059" "2013"  .55596
   
6. "000059" "2014" .572662
   
7. "000059" "2015" .547074
   
8. "000059" "2016" .577447
   
9. "000059" "2017" .507707
   
10. "000059" "2018" .496762
    
11. "000059" "2019" .494996
    
12. "000301" "2012" .392615
    
13. "000301" "2013" .378718
    
14. "000301" "2014" .373525
    
15. "000301" "2015" .390048
    
16. "000301" "2016" .387173
    
17. "000301" "2017" .379991
    
18. "000420" "2012" .225267
    
19. "000420" "2013" .223525
    
20. end

复制代码

1. * Example generated by -dataex-. For more info, type help dataex
   
2. clear
   
3. input str12(Stkcd year) double Ins
   
4. "000059" "2012" .596965
   
5. "000059" "2013"  .55596
   
6. "000059" "2014" .572662
   
7. "000059" "2015" .547074
   
8. "000059" "2016" .577447
   
9. "000059" "2017" .507707
   
10. "000059" "2018" .496762
    
11. "000059" "2019" .494996
    
12. "000301" "2012" .392615
    
13. "000301" "2013" .378718
    
14. "000301" "2014" .373525
    
15. "000301" "2015" .390048
    
16. "000301" "2016" .387173
    
17. "000301" "2017" .379991
    
18. "000420" "2012" .225267
    
19. "000420" "2013" .223525
    
20. end

复制代码