I'm guessing that you have more elements in your weights vector than you have observations? It's hard to tell without seeing your data. See below: #Generate fake data y=rnorm(10) X1=rnorm(10) X2=rnorm(10) X3=rnorm(10) #Create a 10 element vector of weights wts=abs(rnorm(10)) #weighted lm works fine lm(y~X1+X2+X3, weights=wts) #Add an additional element to weight vector wts=c(wts, abs(rnorm(1))) #weighted lm throws warning message lm(y~X1+X2+X3, weights=wts) --Mark J. Lamias
________________________________ From: rbowman16 <roosevelt.bow...@gmail.com> To: r-help@r-project.org Sent: Wednesday, November 21, 2012 9:34 AM Subject: [R] Weighted least squares Hi everyone, I admit I am a bit of an R novice, and I was hoping someone could help me with this error message: Warning message: In lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) : extra arguments weigths are just disregarded. My equation is: lm( Y ~ X1 + X2 + X3, weigths = seq(0.1, 1, by = 0.1)) -- View this message in context: http://r.789695.n4.nabble.com/Weighted-least-squares-tp4650292.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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. [[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.
