r - 如何更改 R 中 reReg 包中 plotEvents 中线条的颜色？

Question

我在 reReg 包中绘制了一个图为

library(frailtypack)
data(readmission, package = "frailtypack")
library(reReg)
readmission <- subset(readmission, !(id %in% c(60, 109, 280)))
attach(readmission)
Recur(t.stop, id, event, death)

reObj <- Recur(t.stop, id, event, death)
#plot(reObj)

plotEvents(Recur(t.stop, id, event, death) ~ sex, data = readmission)

这是图片

问题是如何将线条的颜色（对于每个主题）从灰色变为渐变或彩色？

标签： rplotcolors