tabstat v3, stats(sd) by(v1)
结果Summary for variables: casset
     by categories of: v1

      v1 |        sd
---------+----------
  600001 |  .0471933
  600004 |  .0435785
  600005 |  .0551826
  600006 |  .0498376
  600007 |  .0068826
  600008 |  .0136708
  600009 |  .0175416
  600010 |  .0509505
  600011 |   .019347
  600012 |  .0322746
  600018 |  .0286665
  600019 |   .029362
  600020 |  .0138624
  600021 |  .0176977
  600026 |  .0596849
  600028 |  .0342594
  600029 |  .0317959
  600031 |  .0262384
  600033 |  .0451346
  600038 |  .0402832
  600039 |   .018568
  600050 |  .0580266
  600051 |  .0632755
  600052 |  .0698759
  600053 |  .0412855
  600054 |   .056363
  600055 |  .0405049
  600056 |  .0537636
  600057 |  .1625053
  600058 |  .1124382
  600059 |  .0396125
  600060 |  .0289692
  600061 |  .0666903
  600062 |  .0305307
  600063 |  .0136935
  600064 |  .0381578
  600066 |  .0356586
  600067 |  .0516579
  600068 |  .0115058
  600069 |  .0436636
  600070 |  .0271305
  600071 |   .059372
  600072 |  .0298076
  600073 |  .0346637
  600075 |  .0412406
  600077 |    .07775
  600078 |  .0231688
  600079 |  .0239101
  600081 |  .0448097
  600082 |  .0275215
  600085 |  .0245235
  600086 |  .0590132
  600089 |  .0263915
  600090 |  .1400494
  600093 |  .0519791
  600094 |  .0544018
  600095 |  .0251261
  600096 |  .0241407
  600097 |  .1048119
  600098 |  .0230613
  600099 |  .0415109
  600100 |  .0100318
。。。
怎样生成一新变量用来描述sd，然后保存呢？
求助求助，先在此谢谢各位大侠啦