22 lines
431 B
R
22 lines
431 B
R
options(na.action=na.exclude) # preserve missings
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options(contrasts=c('contr.treatment', 'contr.poly')) #ensure constrast type
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library(survival)
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#
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# Test on the ovarian data
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fit1 <- coxph(Surv(futime, fustat) ~ rx + age, ovarian)
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fit2 <- coxph(Surv(futime, fustat) ~ rx + pspline(age, df=2),
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data=ovarian)
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fit2$iter
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fit2$df
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fit2$history
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fit4 <- coxph(Surv(futime, fustat) ~ rx + pspline(age, df=4),
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data=ovarian)
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fit4
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