Rodrigo wrote:
Hi,
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
message:
calibrate(modelo1,B=200,bw=F,u=13)
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,
Rodrigo
Rodrigo,
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
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
