请给出多状态模型的R代码示例
时间: 2023-04-02 10:01:50 浏览: 117
以下是多状态模型的R代码示例:
library(msm)
data(larynx)
larynx$sex <- factor(larynx$sex, levels = 1:2, labels = c("Male", "Female"))
larynx$stage <- factor(larynx$stage, levels = 1:4, labels = c("I", "II", "III", "IV"))
larynx$agegp <- cut(larynx$age, breaks = c(, 50, 60, 70, 100), labels = c("-50", "50-60", "60-70", "70+"))
larynx$trt <- factor(larynx$trt, levels = 1:2, labels = c("Standard", "Experimental"))
# Fit a 3-state model
larynx.msm <- msm(state ~ sex + agegp + stage + trt, subject = id, data = larynx, qmatrix = ~ sex + agegp + stage + trt)
summary(larynx.msm)
# Predicted state occupancy probabilities
predict(larynx.msm, type = "state")
# Plot the transition intensities
plot(larynx.msm, main = "Transition intensities")
# Plot the predicted state occupancy probabilities
plot(larynx.msm, main = "Predicted state occupancy probabilities", type = "occupancy")