[R] how to test this

[Simon Blomberg]

This is two tests: Whether the slope != 1 and whether the intercept != 0.

To do this, include an offset in your model:

fit  <- lm(y ~ x + offset(x), data=dat)

HTH,

Simon.


At 03:44 PM 3/08/2005, Jin.Li at csiro.au wrote:
>Dear there,
>
>I am wondering how to test whether a simple linear regression model
>(e.g. y=1.05x) is significantly different from a 1 to 1 line (i.e. y=x).
>Thanks.
>
>Regards,
>
>Jin
>
>
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Simon Blomberg, B.Sc.(Hons.), Ph.D, M.App.Stat.
Centre for Resource and Environmental Studies
The Australian National University
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