多对一合并出错

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我在进行stata多对一合并时，两个数据集都有IDind这个变量，但是合并结果显示没有找到这个变量。这是怎么回事？各位帮我看看。master数据

1. * Example generated by -dataex-. To install: ssc install dataex
   
2. clear
   
3. input int wave double IDind float A8
   
4. 2011 111101001001 2
   
5. 2011 111101001002 2
   
6. 2011 111101002001 4
   
7. 2011 111101003001 2
   
8. 2011 111101003002 2
   
9. 2011 111101004001 2
   
10. 2011 111101004002 2
    
11. 2011 111101005001 2
    
12. 2011 111101005002 2
    
13. 2011 111101006001 2
    
14. 2011 111101006002 2
    
15. 2011 111101007001 2
    
16. 2011 111101007002 2
    
17. 2011 111101008001 2
    
18. 2011 111101008002 2
    
19. 2011 111101009001 4
    
20. 2011 111101010001 2
    
21. 2011 111101010002 2
    
22. 2011 111101011001 2
    
23. 2011 111101011002 2
    
24. end
    
25. label values A8 married
    
26. label def married 2 "Married", modify
    
27. label def married 4 "Widowed", modify

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using数据

1. * Example generated by -dataex-. To install: ssc install dataex
   
2. clear
   
3. input double IDind byte gender
   
4. 111101001001 1
   
5. 111101001002 2
   
6. 111101002001 2
   
7. 111101003001 1
   
8. 111101003002 2
   
9. 111101004001 1
   
10. 111101004002 2
    
11. 111101005001 2
    
12. 111101005002 1
    
13. 111101006001 2
    
14. 111101006002 1
    
15. 111101007001 1
    
16. 111101007002 2
    
17. 111101008001 1
    
18. 111101008002 2
    
19. 111101009001 2
    
20. 111101010001 2
    
21. 111101010002 1
    
22. 111101011001 1
    
23. 111101011002 2
    
24. end
    
25. label values gender sex
    
26. label def sex 1 "male", modify
    
27. label def sex 2 "female", modify

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程序是：merge m:1 IDind using merge2

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关键词：generated generate Married install example

试试

1. * Example generated by -dataex-. To install: ssc install dataex
   
2. clear
   
3. input double IDind byte gender
   
4. 111101001001 1
   
5. 111101001002 2
   
6. 111101002001 2
   
7. 111101003001 1
   
8. 111101003002 2
   
9. 111101004001 1
   
10. 111101004002 2
    
11. 111101005001 2
    
12. 111101005002 1
    
13. 111101006001 2
    
14. 111101006002 1
    
15. 111101007001 1
    
16. 111101007002 2
    
17. 111101008001 1
    
18. 111101008002 2
    
19. 111101009001 2
    
20. 111101010001 2
    
21. 111101010002 1
    
22. 111101011001 1
    
23. 111101011002 2
    
24. end
    
25. 
    
26. format IDind %13.0f
    
27. label values gender sex
    
28. label def sex 1 "male", modify
    
29. label def sex 2 "female", modify
    
30. 
    
31. tempfile a
    
32. save `a'
    
33. 
    
34. * Example generated by -dataex-. To install: ssc install dataex
    
35. clear
    
36. input int wave double IDind float A8
    
37. 2011 111101001001 2
    
38. 2011 111101001002 2
    
39. 2011 111101002001 4
    
40. 2011 111101003001 2
    
41. 2011 111101003002 2
    
42. 2011 111101004001 2
    
43. 2011 111101004002 2
    
44. 2011 111101005001 2
    
45. 2011 111101005002 2
    
46. 2011 111101006001 2
    
47. 2011 111101006002 2
    
48. 2011 111101007001 2
    
49. 2011 111101007002 2
    
50. 2011 111101008001 2
    
51. 2011 111101008002 2
    
52. 2011 111101009001 4
    
53. 2011 111101010001 2
    
54. 2011 111101010002 2
    
55. 2011 111101011001 2
    
56. 2011 111101011002 2
    
57. end
    
58. format IDind %13.0f
    
59. label values A8 married
    
60. label def married 2 "Married", modify
    
61. label def married 4 "Widowed", modify
    
62. 
    
63. merge m:1 IDind using `a'

复制代码