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From |
Svend Juul <SJ@SOCI.AU.DK> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
Re: st: zoom in on a Kaplan-Meier plot (display only a subset of the timeaxis) |

Date |
Thu, 2 Oct 2008 13:36:08 +0200 |

Jacob Wegelin wrote: Is there a way to create a Kaplan-Meier plot that is "zoomed in" on a subset of the time axis? To make this concrete: It is easy to create a twoway plot that is "zoomed in" on a portion of the axes, for instance: ... But what if we have survival data? The second sts graph command below does *not* do what I want; it creates a subset of the data and builds a Kaplan-Meier plot afresh using that subset. Is there any straightforward way to make a "zoomed-in" Kaplan-Meier plot? /* clear set seed 5 set obs 30 gen ID=_n gen t=exp(uniform()) - 1 stset t sts graph sts graph if t > 0.5 & t < 0.8 ===================================================================== The -tmin()- and -tmax()- options to -stset graph- do remove parts of the curve, as I think Peter Lachenbruch suggested, but I did not succeed in restricting the x-axis length. But using -sts generate- works: sts generate s=s sort t twoway scatter s t if t>0.5 & t<0.8 , msymbol(none) connect(J) Hope this helps Svend __________________________________________ Svend Juul Institut for Folkesundhed, Afdeling for Epidemiologi (Institute of Public Health, Department of Epidemiology) Vennelyst Boulevard 6 DK-8000 Aarhus C, Denmark Phone: +45 8942 6090 Home: +45 8693 7796 Email: sj@soci.au.dk __________________________________________ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

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