Displaying 1 result from an estimated 1 matches for "a16_1_1".
2008 Dec 23
6
Interval censored Data in survreg() with zero values!
...tion.
Unfortunately the Weibull doesn't allow for zero values in time data,
as it requires x > 0. So I tried the exponential distribution that
allows x to be >= 0 and the log-normal that sets x <= 0 to 0. Still I
get the same error:
" Fehler in survreg(formula = Surv(ifelse(A16_1_1 >= 100, 100,
ifelse(A16_1_1 <= :
Invalid survival times for this distribution "
The only distributions that seem to work are gaussian and logistic, but
they don't really fit the data.
I searched for this problem in the archive and found a suggestion by
Terry Therneau to set all...