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htypeed1
2005 Oct 25
0
One more about Error in step() (or stepAIC) for Cox model
...Prof.Ripley's suggestion. I fixed the program by adding a
lower scope, and the program ran, but I still got warning messages, and
don't know what is going on, would this affect my results?
...
Step: AIC= 12337.74
Surv(tlfup, cen) ~ MI[[j]]$trt + MI[[j]]$agem40 + MI[[j]]$agem40sq +
mhtypeed1 + mhtypeed2
Df AIC
<none> 12338
- MI[[j]]$agem40sq 1 12338
- MI[[j]]$agem40 1 12339
- mhtypeed2 1 12353
- mhtypeed1 1 12365
There were 50 or more warnings (use warnings() to see the first 50)
Warning messages:
1: X matrix deemed to be...