为什么我复制了下载dataex的那个命令但是stata没有执行这个命令啊！！

1. 第一个要安装 ssc install dataex。2. 第二个，你要"先将资料叫进 Stata"，再执行 dataex。

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好主意

试试行不行

* Example generated by -dataex-. To install: ssc install dataex
clear
input int(price mpg)
4099 22
4749 17
3799 22
4816 20
7827 15
5788 18
4453 26
5189 20
10372 16
4082 19
end
[/CODE]

* Example generated by -dataex-. To install: ssc install dataex
clear
input int(price mpg)
4099 22
4749 17
3799 22
4816 20
7827 15
5788 18
4453 26
5189 20
10372 16
4082 19
end

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input float(cr adr) double trait
      . .940752 12013
      . .940109 12014
      . .935584 12015
      . .931547 12016
      . .931644 12017
      . .929783 12018
      . .920544 12019
.130743  .77997 22013
.178367 .772046 22014
.12319 .777015 22015

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支持一下

* Example generated by -dataex-. To install: ssc install dataex
clear
input float corp_state_owned
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
end

600108
600467
600257
600975
601118
300106
600257
  2299
   713
  2299

学到了

* Example generated by -dataex-. To install: ssc install dataex
clear
input long stkcd byte year float(roaa roaa1)
2  1  .038913  .053125
2  2  .046727  .038913
2  3  .040993  .046727
2  4   .03916  .040993
2  5  .041348   .03916
2  6  .038183  .041348
2  7  .037937  .038183
2  8   .04245  .037937
2  9  .034129   .04245
2 10  .031929  .034129
2 11  .032234  .031929
9  1  .044634  .056781
9  2  .054465  .044634
9  3  .044051  .054465
9  4   .03228  .044051
9  5  .023331   .03228
9  6   .03263  .023331
9  7  .032091   .03263
9  8  .053324  .032091
9  9    .0194  .053324
9 10  .011924    .0194
9 11  .022281  .011924
11  1  .004659 -.014524
11  2  .034199  .004659
11  3  .060069  .034199
11  4  .073569  .060069
11  5  .094875  .073569
11  6  .077671  .094875
11  7  .107512  .077671
11  8  .035806  .107512
11  9  .053327  .035806
11 10  .115506  .053327
11 11  .101828  .115506
12  1   .04821  .067107
12  2  .083806   .04821
12  3  .128068  .083806
12  4  .087526  .128068
12  5  .025796  .087526
12  6  .107516  .025796
12  7  .055877  .107516
12  8  .034983  .055877
12  9  .046902  .034983
12 10  .042418  .046902
12 11  .024705  .042418
14  1  .026181  .001575
14  2  .047744  .026181
14  3  .048823  .047744
14  4  .035961  .048823
14  5  .016419  .035961
14  6  .018602  .016419
14  7  .028069  .018602
14  8  .024607  .028069
14  9  .015537  .024607
14 10   .00719  .015537
14 11  .080596   .00719
16  1  .026331  .023069
16  2  .010863  .026331
16  3  .006145  .010863
16  4   .00143  .006145
16  5  .002743   .00143
16  6  .003801  .002743
16  7  .003607  .003801
16  8 -.089531  .003607
16  9  .005346 -.089531
16 10  .200068  .005346
16 11   .02027  .202034
21  1  .073061  .137866
21  2  .048991  .073061
21  3  .053452  .048991
21  4  .021297  .053452
21  5   .00083  .021297
21  6  .011574   .00083
21  7  .011111  .011574
21  8  .012601  .011111
21  9  .019095  .012601
21 10  .034573  .019095
21 11  .036383  .034573
25  1  .003002   .00793
25  2  .013285  .003002
25  3  .006542  .013285
25  4  .002191  .006542
25  5  .001507  .002191
25  6  .004305  .001507
25  7  .010624  .004305
25  8   .03657  .010624
25  9  .023228   .03657
25 10  .046876  .023228
25 11  .051945  .046876
26  1  .045115  .059057
26  2  .046426  .045115
26  3  .038587  .046426
26  4  .054997  .038587
26  5  .034766  .054997
26  6  .036565  .034766
26  7  .039943  .036565
26  8  .028739  .039943
26  9   .02756  .028739
26 10  .039839   .02756
26 11   .05107  .039839

如何计算 在Stkcd Accper相同的情况下，Typrep=B时C001020000的值 除以Typrep=A时C001020000的值
* Example generated by -dataex-. To install: ssc install dataex
clear
input str12(Stkcd Accper Typrep) double C001020000
"000002" "1998-12-31" "A" 115207468.33
"000002" "1999-12-31" "A" 158161436.78
"000002" "2000-12-31" "A" 202494288.48
"000002" "2001-12-31" "A" 249028992.99
"000002" "2002-12-31" "A"  248990440.9
"000002" "2003-12-31" "A" 293181094.09
"000002" "2003-12-31" "B"  35491472.27
"000002" "2004-12-31" "A" 351839465.92
"000002" "2004-12-31" "B"  37657496.06
"000002" "2005-12-31" "A" 452287228.49

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支持黄老师^^