The NaN/Inf message is almost certainly from a singular fit.
I would be interested in a copy of the data set to test it: data sets that cause this
are rare, and help me to tune the convergence/signularity criteria in the program.
Note: it is much easier to use coxph(survobj ~ therapy + ReceptorA + ReceptorB,
data=sample.data) than to put "sample.data$" in front of every variable name; and easier
to read as well.
Terry Therneau (author of coxph function)
On 02/14/2013 05:00 AM, r-help-requ...@r-project.org wrote:
I am trying to fit a multivariate Cox proportional hazards model,
modelling survival outcome as a function of treatment and receptor
status. The data look like below:
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