[R] Problem with calibrate function
Frank E Harrell Jr
f.harrell at vanderbilt.edu
Fri Dec 11 17:25:17 CET 2009
> I´m trying to use the calibrate function from rms package (made by prof.
> Harrell) after fitting a model using cph. But it returns the following error
> Using Cox survival estimates at 13 Days
> Convergence problems.... stopping addition
> Error in hare(S[, 1], S[, 2], fun(est.surv), maxdim = maxdim, ...) :
> no convergence
> this is serious!
> Has anybody experienced the same problem? Can anyone help me?
> many thanks,
This is a new feature in rms and there are probably a few warnings I
need to put in the help file. How many events are in the dataset used
to develop your model? Why did you specify bw=FALSE (which is the
default)? Did you use any variable selection when building the model?
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
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