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testtimeseries
2012 Jun 29
1
predicting expected number of events using a coxph model
I fit a coxph model:
coxphfit <- coxph(Surv(sampledLifetime, !sampledCensoredQ) ~ curpbc6 +
prevpbc6, sampledTimeSeries)
Now I'm trying to predict the expected number of events using a new dataset.
The documentation suggests that
coxPred <- predict(coxphfit, newdata = testTimeSeries, type="expected")
will do what I want, but I get the error
Error in model.frame.default(data = testTimeSeries, formula =
Surv(sampledLifetime, :
variable lengths differ (found for 'curpbc6')
when I do this. The dataframes sampledTimeSeries and testTimeSeries were
construc...