st: mark censored observations when creating survival curve with 'twoway'

[Werner Wackernagel <werner.wackernagel@medunigraz.at>]

Dear Stata-List,

in sts graph there is an option censored() to mark censored observations.
I' struggling to create such marks manually when creating the graph via
"twoway".
e.g.
twoway lineMain0  Main1 _t if _t<70, sort c(J J) scheme(lean1)
xti("Months") ///
yti("Whatever") yla(0(.1).2, glp(shortdash)) xla(0(6)69) lpattern(solid
dash) legend(pos(11) ring(0) label(1 "TNM1-2") label(2 "TNM3-4")) ti("")
name(size)

Does anybody know how to manually create tick marks for censored
observations?
Is 'sts graph' an .ado file in the stata program folder, so that I could
look into the code to find out how sts graph is achieving this?

Alternative: Is there a way to use sts graph after stcompet / on raw data
imported from R?

Thanks a lot,
Werner Wackernagel

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