Message-ID: <1350630125496-4646707.post@n4.nabble.com>
Date: 2012-10-19T07:02:05Z
From: Sando
Subject: Question about survdiff in for-loop.
Hi everyone!!
I have dataset composed of a numbers of survival analyses.
( for batch survival analyses by using for-loop) .
Here are code !!
#######
dim(svsv)
Num_t<-dim(svsv)
Num<-Num_t[2] # These are predictors !!
names=colnames(svsv)
for (i in 1:Num )
{
name_tt=names[i]
survdiff(Surv(survival.m, survival) ~ names[i], data=svsv)
fit.Group<-survfit(Surv(survival.m, survival) ~ names[i] , data=svsv)
plot(fit.Group, col=2:1, xlab="Survival", ylab="Prob")
}
#####
names[i] is not working in the survdiff.
According to help R , the predictor must be single subset.
And, names[i] is also single character, I think.
But, it do NOT work.
How I can solve this problem ?
Thank you.
--
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