就是取2000年的前四个weight2,2001年的前四个weight2。
谢谢各位大神指教!
| stkcd | acc | inc | tinc | weight | weight2 | HHI |
| 600097 | 2000 | 26978754 | 6.28E+09 | 0.004299 | 1.85E-05 | 0.136708 |
| 600257 | 2000 | 74635242 | 6.28E+09 | 0.011893 | 0.000141 | 0.136708 |
| 000588 | 2000 | 79943236 | 6.28E+09 | 0.012739 | 0.000162 | 0.136708 |
| 000592 | 2000 | 1.44E+08 | 6.28E+09 | 0.022906 | 0.000525 | 0.136708 |
| 600265 | 2000 | 1.54E+08 | 6.28E+09 | 0.024595 | 0.000605 | 0.136708 |
| 000998 | 2000 | 1.63E+08 | 6.28E+09 | 0.025902 | 0.000671 | 0.136708 |
| 600762 | 2000 | 1.94E+08 | 6.28E+09 | 0.030974 | 0.000959 | 0.136708 |
| 000735 | 2000 | 2.26E+08 | 6.28E+09 | 0.03605 | 0.0013 | 0.136708 |
| 000769 | 2000 | 2.74E+08 | 6.28E+09 | 0.043576 | 0.001899 | 0.136708 |
| 000798 | 2000 | 3.29E+08 | 6.28E+09 | 0.052474 | 0.002754 | 0.136708 |
| 200992 | 2000 | 3.50E+08 | 6.28E+09 | 0.055767 | 0.00311 | 0.136708 |
| 000713 | 2000 | 4.08E+08 | 6.28E+09 | 0.064983 | 0.004223 | 0.136708 |
| 600672 | 2000 | 6.35E+08 | 6.28E+09 | 0.101252 | 0.010252 | 0.136708 |
| 600359 | 2000 | 6.86E+08 | 6.28E+09 | 0.109263 | 0.011938 | 0.136708 |
| 600108 | 2000 | 6.90E+08 | 6.28E+09 | 0.109969 | 0.012093 | 0.136708 |
| 600709 | 2000 | 1.84E+09 | 6.28E+09 | 0.293356 | 0.086058 | 0.136708 |
| 600709 | 2001 | 55683712 | 6.13E+09 | 0.009084 | 8.25E-05 | 0.136523 |
| 000592 | 2001 | 78314483 | 6.13E+09 | 0.012776 | 0.000163 | 0.136523 |
| 600506 | 2001 | 99011673 | 6.13E+09 | 0.016152 | 0.000261 | 0.136523 |
| 600097 | 2001 | 1.15E+08 | 6.13E+09 | 0.018704 | 0.00035 | 0.136523 |
| 600762 | 2001 | 1.15E+08 | 6.13E+09 | 0.01877 | 0.000352 | 0.136523 |
| 600257 | 2001 | 1.62E+08 | 6.13E+09 | 0.026397 | 0.000697 | 0.136523 |
| 600265 | 2001 | 1.86E+08 | 6.13E+09 | 0.030313 | 0.000919 | 0.136523 |
| 000769 | 2001 | 1.86E+08 | 6.13E+09 | 0.030344 | 0.000921 | 0.136523 |
| 000735 | 2001 | 2.29E+08 | 6.13E+09 | 0.037295 | 0.001391 | 0.136523 |
| 000998 | 2001 | 2.68E+08 | 6.13E+09 | 0.043704 | 0.00191 | 0.136523 |
| 000798 | 2001 | 3.03E+08 | 6.13E+09 | 0.049464 | 0.002447 | 0.136523 |
| 200992 | 2001 | 3.41E+08 | 6.13E+09 | 0.055637 | 0.003095 | 0.136523 |
| 000713 | 2001 | 3.98E+08 | 6.13E+09 | 0.064993 | 0.004224 | 0.136523 |
| 600359 | 2001 | 5.38E+08 | 6.13E+09 | 0.087711 | 0.007693 | 0.136523 |
| 600672 | 2001 | 5.43E+08 | 6.13E+09 | 0.088542 | 0.00784 | 0.136523 |
| 600108 | 2001 | 6.43E+08 | 6.13E+09 | 0.104856 | 0.010995 | 0.136523 |
| 600313 | 2001 | 1.87E+09 | 6.13E+09 | 0.305258 | 0.093183 | 0.136523 |
----------------------- copy starting from the next line -----------------------
- * Example generated by -dataex-. To install: ssc install dataex
- clear
- input str6 stkcd int acc double(inc tinc weight weight2 HHI)
- "600097" 14975 26978753.55 6275337572.720001 .004299171676003757 .000018482876839698292 .13670837955760362
- "600257" 14975 74635241.77 6275337572.720001 .011893422609558496 .00014145350723993033 .13670837955760362
- "000588" 14975 79943235.5 6275337572.720001 .012739272520975977 .00016228907043114305 .13670837955760362
- "000592" 14975 143740078.73 6275337572.720001 .022905553217545373 .0005246643559075892 .13670837955760362
- "600265" 14975 154344817.16 6275337572.720001 .024595460462711063 .0006049366784282029 .13670837955760362
- "000998" 14975 162544558.57 6275337572.720001 .025902121867771678 .000670919893309474 .13670837955760362
- "600762" 14975 194374345.12 6275337572.720001 .030974324945478558 .000959408818744123 .13670837955760362
- "000735" 14975 226226697.24 6275337572.720001 .036050123936510976 .0012996114091947675 .13670837955760362
- "000769" 14975 273455333.05 6275337572.720001 .04357619488691072 .0018988847732543945 .13670837955760362
- "000798" 14975 329293608.92 6275337572.720001 .05247424622246576 .0027535464614629745 .13670837955760362
- "200992" 14975 349954070.43 6275337572.720001 .05576657293327327 .0031099107582122087 .13670837955760362
- "000713" 14975 407792782.03 6275337572.720001 .06498340165838203 .004222842399030924 .13670837955760362
- "600672" 14975 635388561.68 6275337572.720001 .10125169432193513 .010251905769109726 .13670837955760362
- "600359" 14975 685664679.47 6275337572.720001 .10926339364605743 .0119384890422225 .13670837955760362
- "600108" 14975 690091204.3 6275337572.720001 .10996877798254999 .012093132361769676 .13670837955760362
- "600709" 14975 1840909605.2 6275337572.720001 .2933562671118696 .08605790138244629 .13670837955760362
- "600709" 15340 55683712.48 6130011277.389999 .009083786303197257 .00008251517283497378 .13652270590682747
- "000592" 15340 78314482.83 6130011277.389999 .012775585441230098 .00016321557632181793 .13652270590682747
- "600506" 15340 99011673.35 6130011277.389999 .016151956149770184 .0002608856884762645 .13652270590682747
- "600097" 15340 114653885.07 6130011277.389999 .018703698881091888 .00034982836223207414 .13652270590682747
- "600762" 15340 115062162.7 6130011277.389999 .01877030196084574 .0003523242485243827 .13652270590682747
- "600257" 15340 161812809.55 6130011277.389999 .026396820858524704 .0006967921508476138 .13652270590682747
- "600265" 15340 185817805.77 6130011277.389999 .03031279998706894 .0009188658441416919 .13652270590682747
- "000769" 15340 186008483.1 6130011277.389999 .030343905530170183 .0009207525872625411 .13652270590682747
- "000735" 15340 228620287.37 6130011277.389999 .03729524743506518 .0013909355038776994 .13652270590682747
- "000998" 15340 267908178.21 6130011277.389999 .043704353236372576 .0019100705394521356 .13652270590682747
- "000798" 15340 303215263.17 6130011277.389999 .04946406286206724 .0024466936010867357 .13652270590682747
- "200992" 15340 341055565 6130011277.389999 .055637020809073075 .0030954780522733927 .13652270590682747
- "000713" 15340 398406792.53 6130011277.389999 .06499283190546287 .004224068019539118 .13652270590682747
- "600359" 15340 537671097.6 6130011277.389999 .08771127380844339 .007693267427384853 .13652270590682747
- "600672" 15340 542765733.43 6130011277.389999 .0885423711098123 .007839751429855824 .13652270590682747
- "600108" 15340 642767794.21 6130011277.389999 .1048558909802975 .010994757525622845 .13652270590682747
- "600313" 15340 1871235551.02 6130011277.389999 .30525809274150695 .0931825041770935 .13652270590682747
- end
- format %tdCCYY acc
------------------ copy up to and including the previous line -------


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