Terry Therneau
Terry Therneau
I thought about this some more, and I now think updating a tdc() is impossible to do reliably. Assume that the tmerge data set has multiple tdc variables, and that...
I've thought about this some more, and now believe that there is no valid was to update a tdc() variable. Here is the problem. 1. A variable x1= tdc(day, value)...
This is nice work. I was genuinely surprised at the number of fixes in the package code, many oversights and a few wrong memories: I actually thought that the model.frame...
I'm still grappling with how best to use git, so have patience while I work that out, in particular how to pull things down to my test bed and run...
I have just pushed an update that incorporates all but iter.max, and passes R CMD check.
I would do this in a much simpler way, i.e., concordance(fit4, fit5) I had not considered the setup you used, and will have to think about this a bit.
This is a useful suggestion --- I recently added n.id to the survfit object based on the same thought.
This has now been added: the coxph object has an n.id element, if there was an id argument.
You are correct, and this is a problem. Older versions of cox.zph used an approximate score test, which is quite good 99% of the time, but could give seriously biased...
I have been very slow to attach this issue, but I've finally rolled up my sleeves and carefully looked at it. That started with adding all the math detail to...