km_combine {RPEXE.RPEXT}

Comparing two Kaplan Meier curves in one plot

Description

The function compares two Kaplan Meier curves in one plot

Usage

km_combine(x1, x2, pos = 0)

Arguments

x1

Nx2 data matrix,first columen represents survival time of the i-th subject, second column represents censored flag (0 if not censored, 1 if censored)

x2

Nx2 data matrix,first columen represents survival time of the i-th subject, second column represents censored flag (0 if not censored, 1 if censored)

pos

The position of the legend. Can be 0 or 1. The legend will be on the topright if set to 0. The legend will be on the bottomleft if set to 1. Default is 0.

Value

A combined Kaplan Meier curve

Examples

t1 <- c(2,3,4,5.5,7,10,12,15)
c1 <- c(0,0,1,0,0,1,0,0)
t2 <- c(1,3,5,4,8,10,9,11)
c2 <- c(0,0,0,0,1,0,0,0)
x1<-cbind(t1,c1)
x2<-cbind(t2,c2)
km_combine(x1,x2)
km_combine(x1,x2,pos=1)