Kaplan-Meier Survival Curve

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fit.pub <- ... plot(fit.pub, xlab = "Months", ylab = "Probability of Not Being Published") fit.posres <- ... plot(fit.posres, xlab = "Months", ylab = "Probability of Not Being Published", col = 3:4) legend("topright", c("Negative Result", "Positive Result"), col = 3:4, lty = 1)