[R] [Q] How to fit data to "HORIZONTAL" line [Broadcast]

[Liaw, Andy]

The horizontal line can be fitted by lm(y ~ 1).

Andy 

From: Young-Jin Lee
> 
> Dear R users
> 
> I posted a question about how to fit data to a "straight" 
> line this afternoon. But I realized that my question was not 
> correct because I needed to fit data to a "HORIZONTAL" line, 
> not a ordinary straight line.
> 
> I looked at lm method, but could not figure out how to fix 
> the regression coefficient to "0". I also tried nls, but it 
> did not work.
> 
> The reason I wanted to fit the data to a horizontal line is 
> that I want to compare AIC/BIC values of two models (a simple 
> straight line mode vs a nonlinear curve model). I thought 
> that I can call
> aic(horizontal_fit_model) and aic (nonlinear_fit_model) to 
> achieve this goal.
> 
> If I can compute AIC/BIC value of a horizontal fit model 
> without doing acutal fitting, that would be fine, too.
> 
> Thank in advance.
> 
> Young-Jin
> 
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