R help - Oct 2001 - No subject

Is it possible to set the intercept of a 3rd order
polynomial fit to zero and compute the R squared value
of that fit?  I'm having some trouble.

Thank you,

Jonathan Pietkiewicz

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On Thu, 18 Oct 2001, Jonathan Pietkiewicz wrote:
> Is it possible to set the intercept of a 3rd order
> polynomial fit to zero and compute the R squared value
> of that fit?  I'm having some trouble.
>
summary(lm(y~poly(x,3)-1))
does the fit and gives the r^2 [defined in this case as RSS/sum(y^2)]


	-thomas

Thomas Lumley			Asst. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle

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