I agree that -help axis_label_options- and the FAQ at
http://www.ats.ucla.edu/stat/stata/faq/grdate.htm
tell you that you can use a datelist of the form
, tlabel(01apr2001 01jul2001 01oct2001)
or
, tlabel(1999m1(1)1999m12)
and the example given in the FAQ doesn't work
. sysuse sp500
. tsset date
. tw tsline high low , tlabel(01apr2001 01jul2001 01oct2001, format(%tdmd) )
invalid ticklist, 01apr2001 must be number
invalid syntax
invalid syntax
r(198);
but that doesn't mean you didn't get a nice informative error message ;)
This does work:
foreach v in 01apr2001 01jul2001 01oct2001 {
forv i=1/12 {
if "`: word `i' of `=lower(c(Mons))''"==substr("`v'",3,3) local m=`i'
}
local dlist `dlist'
`=mdy(`m',real(substr("`v'",1,2)),real(substr("`v'",6,.)))'
}
tw tsline high low , tlabel(`dlist', format(%tdmd) )
so numeric dates are fine, and if you want to specify a custom
datelist corresponding to only the observations you have, you can just
use -levels- or levelsof- like so:
gen qdate=quarter(date)
levels qdate, local(qdates)
tw scatter pct qdate, ms(Oh) || tsline pct, tlabel(`qdates', format( %tqcY!Qq))
if I understand your desideratum correctly.
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