hi:lot thanks,how to use list to extract,I type allFit$coefficents,it came to nothing, such as I need to extract the estimates,how to do it by using list
2008/6/3 Austin, Matt <[EMAIL PROTECTED]>: > How about > > > library(nlme) > allFits <- lmList(y ~ t|id, data=table1, pool=FALSE) > > or > > allFits <- by(table1, table1$id, function(x) lm(y ~ t, data=x)) > > Both ways store the results as a list, so you can access individual results > using list extraction. > > > --Matt > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of Manli Yan > Sent: Tuesday, June 03, 2008 9:07 PM > To: r-help@r-project.org > Subject: [R] 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 and many number missing,if I write a loop by using > "for",it will give me a lot "NA", and for sure ,I dont want to type id=## > for about 500 times,any one know how to deal with it? > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
