[R] What are the red line and cut line in lm's Residuals vs Fitted plot?

[mviljamaa]

Do you mean that the red line is a regression line?
Why is the regression (line) weighted?

On 2016-09-19 14:41, S Ellison wrote:
>> What are the red line and cut line in lm's Residuals vs Fitted plot?
> The dotted line is at 0 and the red line is a locally weighted
> regression calculated using lowess and plotted using panel.smooth.
> 
> See ?panel.smooth and ?lowess for details
> 
> The main clue to this is in the arguments to ?plot.lm, which uses
> panel.smooth as a panel function.
> 
> S Ellison
> 
> 
> 
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