On Mon, 25 Jul 2005, Petr Mandys wrote:
> Thank you!
>
> I'm using this:
>
> require(NADA)
>
> var_sf=survfit(Surv(a, !b))
> var_result=new("cenfit", survfit=var_sf)
>
> Class cenfit has methods to get mean a variance from survfit result. Is
> this correct?
>
NADA is designed for left censoring. I don't know if it will work for
right censoring.
There is at least one problem that hasn't been mentioned yet. Unless
your largest observations are uncensored you can't compute the mean or
variance without a parametric model.
survfit() in the survival package used to produce something it called the
mean, but it wasn't.
-thomas
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
