[R] Comparing linear regression coefficients to a slope of 1

[Albyn Jones]

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albyn

On Sat, Nov 24, 2012 at 07:27:25PM -0500, Catriona Hendry wrote:
> Hi!
> 
> I have a question that is probably very basic, but I cannot figure out how
> to do it. I simply need to compare the significance of a regression slope
> against a slope of 1, instead of the default of zero.
> 
> I know this topic has been posted before, and I have tried to use the
> advice given to others to fix my problem. I tried the offset command based
> on one of these advice threads as follows:
> 
> Regression <- lm(y~x+offset(1*x))
> 
> but this resulted in a regression line that was plotted perpendicular to
> the data when added with the abline function.
> 
> I would be extremely grateful for your help!!
> 
> Thanks!!
> 
> Cat
> 
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> 
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-- 
Albyn Jones
Reed College
jones at reed.edu