local vars Fa Qi RD Gw
foreach v of local vars{
bysort stkcd: replace `v'[_n]=`v'[_n-1]
}
出现以下错误
. local vars Fa Qi RD Gw

. foreach v of local vars{
  2. bysort stkcd: replace `v'[_n]=`v'[_n-1]
  3. }
weights not allowed
r(101);

要怎么修改
谢谢