You might consider a probit analysis using ln(Time) as the "dose".
At 09:24 AM 9/4/2008, Richard.Cotton at hsl.gov.uk wrote:
I have a survivor curve that shows account cancellations during the past 3.5 months. ? Fortunately for our business, but unfortunately for my analysis, the survivor curve doesn't yet pass through 50%. ? Is there a safe way to extend the survivor curve and estimate at what time we'll hit 50%?
Without any example code it's hard to say, but take a look at ?predict.coxph and ?predict.survreg in the survival package. Regards, Richie. Mathematical Sciences Unit HSL
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