# # Simplest printout to debug frailty models # fit1 <- survreg(Surv(time, status) ~ frailty(group, theta=.1, sparse=F), data=leukemia) fit2 <-survreg(Surv(time, status) ~ frailty(group, theta=.1, sparse=F), data=leukemia, debug=2, init=c(fit1$coef, log(fit1$scale)), iter=0) fit3 <-survreg(Surv(time, status) ~ frailty(group, theta=.1, sparse=T), data=leukemia, debug=2, init=c(fit1$coef[c(2,3,1)], log(fit1$scale)), iter=0)