*- date
*-
http://www.pinggu.org/bbs/thread-945309-1-1.html
*-
http://www.pinggu.org/bbs/thread-942503-1-1.html
clear
input str20 tt
2006-3-1
2006-3-2
2006-3-3
2006-3-6
2006-3-7
2006-3-8
2006-3-9
2006-3-10
2006-3-13
2006-3-14
2006-3-15
2006-3-16
2006-3-17
2006-3-20
2006-3-21
2006-3-22
2006-3-23
2006-3-24
2006-3-27
2006-3-28
2006-3-29
2006-3-30
2006-3-31
2006-4-3
2006-4-4
2006-4-5
2006-4-6
end
split tt, p(-) gen(s)
replace s2 = "0"+s2 if length(s2)==1
replace s3 = "0"+s3 if length(s3)==1
gen str20 t2 = s1 + "-" + s2 + "-" + s3
drop s*
gen date = date(t2, "YMD")
format date %tdCCYY-NN-DD
*format date %tdCCYYNNDD //备选
tsset date
gen x = _n+20
twoway connect x date, xlabel(#8, angle(30)) // 角度可以调整