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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Plotting estimated survival functions from two different models |

Date |
Fri, 1 Apr 2011 12:23:57 +0100 |

You are using syntax for Stata's -graph- command as it existed before Stata 8 in a more recent Stata. You want something more like line hazard_weibull hazard_dursel _t in 23902/47000, sort ytitle("pop hazard") legend(order(1 "Weibull") 2("log normal")) Incidentally, in your call to -connect()- 11 wa a typo for ll Think of "l" standing for _l_ine and you will see that "1" (the numeral one) makes no sense. Weibull was a person and so his surname should be capitalised. Nick On Fri, Apr 1, 2011 at 12:10 PM, Dami Olajide <damiolajide@gmail.com> wrote: > I need help to plot estimated survival functions from two different > models (weibull and weibull+selection (dursel)) on a single graph, > with the latter using the approach proposed by Boehmke et al (2005). I > have estimated the two models and the respective predicted hazards > saved respectively. I tried to use a sytax from Gutierrez (2002) > comparing 'parametric fraility and shared fraility survival models, > but it did not work. I have 23,901 observations. I followed the idea > of 'set obs' > > set obs 47000 > replace _t = _n - 23901 in 23902/47000 > > then > > from the weibull model; > predict hazard_weibull in 23902/47000, hazard > > and from the duration with selection model; > predict hazard_dursel in 23902/47000, hazard > > then > > graph hazard_weibull hazard_dursel _t in 23902/47000, c(11[-]) s(ii) sort /// > l1title ("pop hazard") /// > key1(c(1) "weibull") key2(c(1[-]) "log normal") > > I received an error message that "class member function not found". > References: > > Boehmke, F., Morey, D., and Shannon, M. (2005). Selection bias and > continuous-time duration models: consequences anf proposed solution. > American Journal of Political Science. Vol. 50 (1): 192-207. > > Gutierrez, R.G. (2002). Parametric fraility and shared fraility > survival models. The Stata Journal, 2 (1):22-44. * * 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/

**References**:**st: Plotting estimated survival functions from two different models***From:*Dami Olajide <damiolajide@gmail.com>

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