如何用Stata画出差分前后的图

数据见附件
aaa1.rar (376 Bytes) 本附件包括：

• aaa1.dta

2017-2-17 16:15:01 上传

1. use "C:\WINDOWS\TEMP\7zOC4A486C7\aaa1.dta"
   
2. gen q=tq(1998q1)+_n-1
   
3. gen c=2
   
4. save temp
   
5. replace c=1
   
6. append using temp
   
7. erase temp.dta
   
8. xtset c q
   
9. gen dx=d.x if c==2
   
10. replace x=dx if c==2
    
11. twoway (line x q), by(c, yrescale)

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也可试试

1. use "aaa1.dta", clear
   
2. 
   
3. gen yq = yq(year, quarter)
   
4. 
   
5. format yq %tq
   
6. tsset yq
   
7. 
   
8. gen dx = D.x
   
9. 
   
10. twoway (tsline x), xlabel(152(8)186, format(%tqCY)) xtitle("")
    
11. graph save Graph "E:\aaa1-level.gph", replace
    
12. twoway (tsline dx), xlabel(152(8)186, format(%tqCY)) xtitle("")
    
13. graph save Graph "E:\aaa1-diff.gph", replace
    
14. gr combine aaa1-level.gph aaa1-diff.gph

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结果为