stata中运行,哪错了?为什么不行
. foreach trt in A B C D E F G H I J K L M{
2.
. . if "`trt'"=="A"continue
3.
. . gen y`trt'=log(d`trt'/(n`trt'-d`trt'))-log(dA/(nA-dA)
4.
. . gen S`trt'`trt'=1/d`trt'+1/(n`trt'-d`trt')+1/dA+1/(nA-dA)
5.
. . foreach trt2 in A B C D E F G H I J K L M{
6.
. . if "`trt'"=="A"continue
7.
. . }
8.
. . }
{ required
r(100);