fgleric 发表于 2013-1-8 00:20 
贴数据
Stkcd Trdmnt Mretwd
000002 2005-02 .003521
000002 2005-03 -.031579
000002 2005-04 .068841
000002 2005-05 -.211864
000002 2005-06 .044165
000002 2005-07 .222930
000002 2005-08 -.046875
000002 2005-09 -.019126
000002 2005-10 .069638
000002 2005-11 .028646
000002 2005-12 .091139
000002 2006-01 .143852
000002 2006-02 .107505
000002 2006-03 .199634
000002 2006-04 -.048855
000002 2006-05 -.041734
000002 2006-06 -.053601
000002 2006-07 .004882
000002 2006-08 .245487
000002 2006-09 .097101
000002 2006-10 .081902
000002 2006-11 .462759
000002 2006-12 .288815
000002 2007-01 -.008420
000002 2007-02 -.037231
000002 2007-03 .125509
000002 2007-04 .089813
000002 2007-05 .620586
000002 2007-06 -.014941
000002 2007-07 .480126
000002 2007-08 .194346
000002 2007-09 -.102578
000002 2007-10 .289073
000002 2007-11 -.189571
000002 2007-12 -.085895
000002 2008-01 -.096741
000002 2008-02 -.107486
000002 2008-03 .101075
000002 2008-04 -.048047
000002 2008-05 -.189577
000002 2008-06 -.265772
000002 2008-07 -.056604
000002 2008-08 -.167059
000002 2008-09 -.077684
000006 2005-02 .063063
000006 2005-03 -.131356
000006 2005-04 .041463
000006 2005-05 -.044496
000006 2005-06 -.023285
000006 2005-07 -.038363
000006 2005-08 .098404
000006 2005-09 -.014528
000006 2005-10 -.039312
000006 2005-11 .051151
000006 2005-12 .038929
000006 2006-01 .570960
000006 2006-02 .105546
000006 2006-03 .043689
000006 2006-04 .103876
000006 2006-05 .120787
000006 2006-06 .020248
000006 2006-07 .080605
000006 2006-08 .092075
000006 2006-09 -.081110
000006 2006-10 .045296
000006 2006-11 .400000
000006 2006-12 .064286
000006 2007-01 -.110365
000006 2007-02 .081308
000006 2007-03 .103876
000006 2007-04 .420646
000006 2007-05 .330402
000006 2007-06 -.063205
000006 2007-07 .285141
000006 2007-08 -.029688
000006 2007-09 .143317
000006 2007-10 .052113
000006 2007-11 -.279250
000006 2007-12 -.028603
000006 2008-01 -.005736
000006 2008-02 .015000
000006 2008-03 -.072755
000006 2008-04 .120963
000006 2008-05 -.153734
000006 2008-06 -.333910
000006 2008-07 .110390
000006 2008-08 -.260819
000006 2008-09 -.210443
000006 2008-10 -.208417
000006 2008-11 .260759
000006 2008-12 -.010040
000006 2009-01 .111562
000006 2009-02 .175182
000006 2009-03 .397516
000006 2009-04 .090000
000007 2005-02 .096000
000007 2005-03 -.145985
000007 2005-04 -.250712
000007 2005-05 .471483
000007 2005-06 -.074935
000007 2005-07 -.047486
000007 2005-08 .131965
000007 2005-09 .023316
000007 2005-10 -.197468
000007 2005-11 .056782
000007 2005-12 -.038806
000007 2006-01 .114907
000007 2006-02 -.002786
000007 2006-03 -.083799
000007 2006-04 -.207317
000007 2006-05 .319231
000007 2006-06 .049563
000007 2006-07 .050000
000007 2006-08 .045502
000007 2006-09 .038462
000007 2006-10 -.114815
000007 2006-11 .066946
000007 2006-12 -.050980
000007 2007-01 .202479
000007 2007-02 .295533
000007 2007-03 .320955
000007 2007-04 .359438
000007 2007-05 .212703
000007 2007-06 -.438490
000007 2007-07 .281996
000007 2007-08 .483926
000007 2007-09 -.157355
000007 2007-10 -.006766
000007 2007-11 -.029973
000007 2007-12 .056180
000007 2008-01 -.058511
000007 2008-02 .180791
000007 2008-03 -.070574
000007 2008-04 .050193
000007 2008-05 .188725
000007 2008-06 -.215464
000007 2008-07 -.052562
000007 2008-08 -.153953
000007 2008-09 -.418033
000007 2008-10 -.146479
000007 2008-11 .049505
000007 2008-12 .018868
000007 2009-01 .111111
000007 2009-02 .180556
000007 2009-03 .072941
000007 2009-04 .059211
..................
就是类似这样的数据,包含从000002到9000957 共计700多支股票的return,现在要从里面按行业进行分类,然后实证。
请问,如何从这么大的面板里面只保留部分股票的数据呢?
谢谢你了~