Displaying 1 result from an estimated 1 matches for "20coxph".
2011 Jun 28
2
coxph() - unexpected result using Crawley's seedlings data (The R Book)
...797-799 I can't detect any differences in results so I don't think there are errors in the data set or in the creation of the status variable.
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Original from the R Book:
http://books.google.com/books?id=8D4HVx0apZQC&lpg=PA799&ots=rQgd_8ofeS&dq=r%20coxph%20crawley&pg=PA799#v=onepage&q&f=false
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My result:
> summary(model1)
Call:
coxph(formula = Surv(death, status) ~ strata(cohort) * gapsize,
data = seedlings)
n= 60, number of events= 60
coef exp(co...