Dear friends,
 suppose i want to do the following caulation for 100 times, how to put the
results of x , y and z into the same dataframe/dataset?
x<-runif(1)
y<-x+1
z<-x+y

thanks in advance!
-- 
Kind Regards,
Zhi Jie,Zhang ,PHD
Department of Epidemiology
School of Public Health
Fudan University
Tel:86-21-54237149

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