Without more information, we can only guess what you did, or what you
are seeing on the page that is "different".
I'll make a random guess though. There are about 5 ways to paramaterize
the Weibull distribution. The standard packages that I know, however,
tend to use the one found in the Kalbfleisch and Prentice book The
Statistical Analysis of Failure time Data. This includes the survreg
funciton in R and lifereg in SAS, and likely stata tthought I don't know
that package. The aftreg function in the eha package uses something
different.
About 1/2 the weibull questions I see are due to a change in parameters.
Terry T.
---- begin included message -----
Dear Community,
I have been using two types of survival programs to analyse a data set.
The first one is an R function called aftreg. The second one an STATA
function called streg.
Both of them include the same analyisis with a weibull distribution. Yet,
results are very different.
Shouldn't the results be the same?
Kind regards,
J
______________________________________________
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.
