*-data: 多选题的处理
*-http://www.pinggu.org/bbs/thread-947408-1-1.html

clear
input assert goods income
459 57 8000
34569 57 20000
359 157 7000
3569 578 9000
349 57 8000
456 57 10000
end

  gen ax = string(assert)

  local vv "ax"
  dropvars `vv'_*
  foreach p in 1 2 3 4 5 6 7 8 9{
          gen byte `vv'_`p' = strpos(`vv', "`p'")>0
        replace `vv'_`p'=. if `vv'==""
  }

  tabstat ax_*, s(sum mean N) format(%6.3f) c(s)
  
  ssc install mrtab, replace   // 这个外部命令很好用
  mrtab ax_*, sort descending // noname

非常感谢连老师的指导