Nothing
library(parfm)
data(culling)
head(culling)
culling <- culling[culling$Time > 0,]
culling$TimeMonths <- culling$Time * 12 / 365.25
set.seed(1)
culling <- culling[sample(1:nrow(culling), 150),]
parfm(Surv(TimeMonths, Status)~LogSCC, cluster="Herd", data=culling,
dist="exponential", frailty="gamma")
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