R语言如何使用segmented包求拐点?

Question

R语言如何使用segmented包求拐点

Answer 1

可以查看segmented包求拐点的例子。R中运行：library(segmented)？segmented。。。。。。#An example using the default method:# Cox regression with a segmented relationship &nbsp;## Not run:&nbsp;library(survival)data(stanford2)o<-coxph(Surv(time, status)~age, data=stanford2)os<-segmented(o, ~age, psi=40) #estimate the breakpoint in the age effectsummary(os) #actually it means summary.coxph(os)plot(os) #it does not workplot.segmented(os) #call explicitly plot.segmented() to plot the fitted piecewise lines如图，拐点已求出。