[CODE]
* Example generated by -dataex-. To install: ssc install dataex
clear
input int idcode byte year float ln_wage
1 70  1.451214
1 71 1.0286198
1 72 1.5899774
1 73  1.780273
1 75 1.7770116
1 77 1.7786806
1 78  2.493976
1 80 2.5517154
1 83 2.4202614
1 85 2.6141725
1 87 2.5363736
1 88  2.462927
2 71 1.3603482
2 72 1.2061975
2 73  1.549883
2 75  1.832581
2 77  1.726721
2 78   1.68991
2 80  1.726964
2 82 1.8082886
2 83  1.863417
2 85 1.7893666
2 87 1.8465303
2 88 1.8564485
3 68 1.4935614
3 69 1.7025284
3 70  1.451214
3 71 1.5474197
3 72 1.6072942
3 73  1.597267
3 75 1.5358496
3 77 1.6228406
3 78  1.566635
3 80 1.5597233
3 82 1.6034193
3 83 1.6142294
3 85 1.7307986
3 87 1.5257654
3 88  1.612777
4 70 2.2885003
4 71 2.3755784
4 72  2.413923
4 73  2.280939
4 75 2.2588139
4 80  1.476236
4 82 1.2809334
4 83  1.515855
4 85 1.9301697
4 87 1.9190345
4 88 2.2009745
5 68  1.627093
5 69 1.7876856
5 70  1.820858
5 71 1.8585224
5 72 1.9793015
5 73 1.9904118
5 75  1.585505
5 77 1.9375215
5 78 2.0704923
5 80  1.830269
5 82  1.847272
6 68  1.521732
6 69 1.4793844
6 70 1.4793844
6 71  1.518572
6 72 1.6072942
6 73 1.8097416
6 75 1.8539723
6 77   1.96311
6 78  1.982733
6 80 1.8467982
6 82 1.8148247
6 83 1.9199128
6 85  1.958377
6 87  2.007068
6 88 2.0898535
7 68 1.4820668
7 69 1.4904344
7 70 1.5394455
7 71 1.4938796
7 72  1.454573
7 73  1.454573
7 87  .4733421
7 88  1.532477
9 70 1.4722368
9 71  1.717023
9 72 1.7472422
9 73 1.7997917
9 75  2.017152
9 77 2.0913637
9 78 2.1140988
9 80 2.1137757
9 82 2.3125353
9 83 2.3485804
9 85 2.3734872
9 87 2.3688986
9 88 2.3505313
10 69 1.3616014
10 70 1.4614837
10 71 1.6116626
end

你上面有个 [CODE]，底下也有对应的，要一起 copy 过来。