hie 
  when i use plot.survfit to plot more than one graph why I only see the last graph how do i see the other graphs.for example
  
      n=20
      n1=n/2
      n2=n/4
      a11=4;a12=4 ;a21=4 ;a22=4
      t1<-array(1,c(n1))                                             
       t2<-array(2,c(n1))
      treatgrp=matrix(c(t1,t2))                                    
      st11<-array(1,c(n2))
       st12<-array(2,c(n2))
       st21<-array(1,c(n2))
       st22<-array(2,c(n2))
      strata=matrix(c(st11,st12,st21,st22))                 
      time11=array(rweibull(n2,a11,1))
      time12=array(rweibull(n2,a11,1))
      time21=array(rweibull(n2,a21,1))
      time22=array(rweibull(n2,a22,1))
      time=matrix(c(time11, time12, time21, time22))  
      censorTime=runif(n,0,3)
      m=cbind(treatgrp,strata,time,censorTime)                 
      colnames(m)=c(“treat”,”strata”,”time”,”censorTime”)
      
act.surv.time<-pmin(m[,"time"],m[,"censorTime"])
  
m<-cbind(m,act.surv.time)
      m<-cbind(m,0)
         m[m[,3]<m[,4],6]<-1
         colnames(m)[6]<-"censoring"
      m
      b=data.frame(m)
      
d2=survfit(Surv(act.surv.time,censoring)~treatgrp,data=b,type=c("fleming-harrington"),
  
)
  
plot(d2, lty=2:3, fun="cumhaz",
  
        xlab="Months", ylab="Cumulative Hazard")
  
d1=survfit(Surv(act.surv.time,censoring)~treatgrp,data=b,)
  
plot(d1, lty=2:3,
  
        xlab="Months", ylab="survival curves")

I only see the plot of d1 what happens to d2 and how do l view it.
thanks


  
  
 __________________________________________________



	[[alternative HTML version deleted]]

