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all_ids
2008 Jun 04
2
linear model in the repeated data type~
here is the data:
y<-c(5,2,3,7,9,0,1,4,5)
id<-c(1,1,6,6,7,8,15,15,19)
t<-c(50,56,50,56,50,50,50,60,50)
table1<-data.frame(y,id,t)//longitudinal data
what I want to do is to use the linear model for each id ,then get the
estimate value,like:
fit1<-lm(y~t,data=table1,subset=(id==1))
but ,you can see the variable "id" is quite irregular,they are not arranaged
in order