hie l would like to create a 6th column "actual surv time" from the following
data
the condition being
if censoringTime>survivaltime then actual survtime =survival time
else actual survtime =censoring time
the code l used to create the data is
s=2
while(s!=0){ n=20
m<-matrix(nrow=n,ncol=4)
colnames(m)=c("treatmentgrp","strata","censoringTime","survivalTime")
for(i in 1:20)
m[i,]<-c(sample(c(1,2),1,replace=TRUE),sample(c(1,2),1,replace=TRUE),rexp(1,.007),rexp(1,.002))
m<-cbind(m,0)
m[m[,3]>m[,4],5]<-1
colnames(m)[5]<-"censoring"
print(m)
s=s-1
treatmentgrp strata censoringTime survivalTime censoring
[1,] 1 1 1.012159 1137.80922 0
[2,] 2 2 32.971439 247.21786 0
[3,] 2 1 85.758253 797.04949 0
[4,] 1 1 16.999171 78.92309 0
[5,] 2 1 272.909896 298.21483 0
[6,] 1 2 138.230629 935.96765 0
[7,] 2 2 91.529859 141.08405 0
l keep getting an error message when i try to create the 6th column
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