命令：
local money "Emax_score Smax_score Gmax_score Emin_score Smin_score Gmin_score  Emean_score Smean_score Gmean_score Estd_score Sstd_score Gstd_score"

foreach x of local money {
        by stock_id year, sort: replace "`x'"[_n-1] if "`x'"[_n]==. & "`x'"[_n-1]!=.
}


报错：
"Emax_score invalid name
r(198);