[R] Weighted least squares

[rbowman16]

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))



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