[R] Error in using coxph()

[Siew Leng TENG]

Hi,

I am getting errors of the following kind. I can't
seem to point the source of the error. I would greatly
appreciate any advice.

Many thanks and good day,
-Melinda


Error message :
----------------
"Ran out of iterations and did not converge in:
fitter(X, Y, strats, offset, init, control, weights =
weights,..."

Details :
---------
E is a vector of survival times (or censored times),
1-F is a vector of '0's, and cov is a matrix of 1
column. There are altogether 75 observations.

Tried :
------
P <- try(surv.cox <- coxph(Surv(E, 1-F) ~ cov,
coxph.control(iter.max=1e10, eps = 1e-03)))

Output (from above command) :
-----------------------------
Call:
coxph(formula = Surv(E, F) ~ cov, data =
coxph.control(iter.max = 1e+10, 
    eps = 0.001))


      coef exp(coef) se(coef)     z     p
cov -0.233     0.793     0.11 -2.11 0.035

Likelihood ratio test=4.51  on 1 df, p=0.0336  n= 75 


Machine Specs :
----------------
Unix/ Windows XP
R-1.8.1
Survival package
		
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