stata 形成月度数据

clear
set obs 12
gen m=_n
gen bz=1
save yue,replace
clear
set obs 10
gen year=2012+_n
gen bz=1
joinby bz using yue
drop bz
sort year m
gen d=1
tostring year m d,replace force
replace m=ustrright("00"+m,2)
gen cc=year+m+"0"+d

gen date=date(cc,"YMD")
format %tmCCYY!mNN date