clear all
mkf index
frame index{
cntrade 000300, index
keep date rmt
gen year = year(date)
}
出现结果:
do "/var/folders/hp/yp2s16gn001bjkq_z7mvrycm0000gn/T//SD01115.000000"
. clear all
. mkf index
. frame index{
. hktrade 000300, index
option index not allowed
r(198);
. keep date rmt
. gen year = year(date)
. }
r(198);
end of do-file
r(198);