[R] how to extrac one coef from lm at a time

[Thomas Lumley]

On Tue, 21 May 2002, Jonathan Baron wrote:

> On 05/21/02 12:07, Antonio Olinto wrote:
> >How to extract the elevation and the slope values from a linear model (lm)
> >separately?
> >
> >coef(model.lm) gives both of them.
>
> One way is
> model.lm$coef[1]
> for the intercept
> and
> model.lm$coef[2]
> for the slope of the first predictor, and so on.

coef(model.lm)[2]
or
coef(model.lm)["x"]

are preferred -- the point of accessor functions like coef() is to hide
the inner structure of the model object. For coef() it doesn't matter a
lot, but there are plenty of models for which model$resid is not the same
as resid(model).


	-thomas

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